<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (a)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-1"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> Hepatitis-B is initially not caused by contamination of water, but by the exposure to infectious agents on the other hand, jaundice, cholera and typhoid are water and food borne diseases which are the caused the by contamination of food item.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-2"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Nuisance growth of aquatic plants and bloom-forming algae in natural water is generally due to high concentrations of</p> <p class="fragment">(a) Carbon <br> (b) Sulphur <br> (c) Calcium <br> (d) Phosphorus </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-3"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (d)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-4"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> Nuisance growth of aquatic plants and bloom the forming algae in natural water bodies is generally due to high concentration of dissolved organic and inorganic nutrients materials Phosphorus favours the growth of aquatic weed plants like Eichhornia (water hyacinth) and certain blue-green algae.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-5"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Algal blooms impart a distinct colour to water due to</p> <p class="fragment">(a) Their pigments <br> (b) Excretion of coloured substances <br> (c) Formation of coloured chemicals in water facilitated by physiological degradation of algae <br> (d) Absorption of light by algal cell wall </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-6"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (a)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-7"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> Algal bloom impart distinct colour to water due to their pigmens.</p> <ul> <li>Pigment composition of several groups of algae.</li> </ul> <table> <thead> <tr> <th style="text-align:center">Green algae</th> <th style="text-align:center">-</th> <th style="text-align:center">Chlorophyll-b</th> </tr> </thead> <tbody> <tr> <td style="text-align:center">Brown algae</td> <td style="text-align:center">-</td> <td style="text-align:center">Chlorophyll- $c_{1}+c_{2}$ fucoxanthin</td> </tr> <tr> <td style="text-align:center">yellow algae</td> <td style="text-align:center">-</td> <td style="text-align:center">Chlorophyll- $c_{1}+c_{2}$ fucoxanthin</td> </tr> <tr> <td style="text-align:center">Red algae</td> <td style="text-align:center">-</td> <td style="text-align:center">Phycoerythrin, phycoyanin</td> </tr> <tr> <td style="text-align:center">Blue algae</td> <td style="text-align:center">-</td> <td style="text-align:center">Phycoerythrin, phycoyanin</td> </tr> </tbody> </table> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-8"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Match the items in column I and column II and choose the correct option.</p> <p><Success>Ques. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-9"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><img src="https://cdn.mathpix.com/cropped/2024_01_24_136af43fdd62bf9dcffdg-281.jpg?height=246&width=781&top_left_y=414&top_left_x=449"></p> <p><Success>Ques. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-10"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <ul> <li>The correct matches is</li> </ul> <table> <thead> <tr> <th style="text-align:center"></th> <th style="text-align:center">A</th> <th style="text-align:center">B</th> <th style="text-align:center">C</th> <th style="text-align:center">D</th> </tr> </thead> <tbody> <tr> <td style="text-align:center">(a)</td> <td style="text-align:center">2</td> <td style="text-align:center">1</td> <td style="text-align:center">4</td> <td style="text-align:center">3</td> </tr> <tr> <td style="text-align:center">(b)</td> <td style="text-align:center">3</td> <td style="text-align:center">2</td> <td style="text-align:center">4</td> <td style="text-align:center">1</td> </tr> <tr> <td style="text-align:center">(c)</td> <td style="text-align:center">3</td> <td style="text-align:center">4</td> <td style="text-align:center">1</td> <td style="text-align:center">2</td> </tr> <tr> <td style="text-align:center">(d)</td> <td style="text-align:center">3</td> <td style="text-align:center">1</td> <td style="text-align:center">4</td> <td style="text-align:center">2</td> </tr> </tbody> </table> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-11"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong></p> <table> <thead> <tr> <th style="text-align:left">Column I</th> <th style="text-align:left">Column I</th> </tr> </thead> <tbody> <tr> <td style="text-align:left">A. UV ray</td> <td style="text-align:left">Snow blindness (effect cornea)</td> </tr> <tr> <td style="text-align:left">B. Biodegradable organic matter</td> <td style="text-align:left">BOD</td> </tr> <tr> <td style="text-align:left">C. DDT</td> <td style="text-align:left">Magnification</td> </tr> <tr> <td style="text-align:left">D. Phosphate</td> <td style="text-align:left">Eutrophication</td> </tr> </tbody> </table> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-12"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> In the textbook you same across three mile island and chernobyl disasters associated with accidental leakage of radioactive wastes.</p> <ul> <li>In India we had Bhopal gas tragedy.</li> <li>It is associated with which of the following?</li> </ul> <p class="fragment">(a) $\mathrm{CO}_{2}$ <br> (b) Methyl isocyanate <br> (c) CFC's <br> (d) Methyl cyanate </p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-13"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> (b)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primarymultiple-choice-questions-mcqsprimary-14"><Primary>Multiple Choice Questions (MCQs)</Primary></h4> <hr> <div class="text-container"> <p><strong>Sol.</strong> MIC (Methyl Isocynate) was leaked from insecticide (SAVIN) unit of Union Carbide at Bhopal.</p> <ul> <li>Which lead to Bhopal Gas Tragedy.</li> <li>This chemical tragedy occured on December 2rd 1984 at Bhopal, the capital of Madhya Pradesh.</li> <li>In which around 2000-3000 people died on that some night.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> <span style="color:blue">Multiple choice questions (MCQs)</span> $\rightarrow$ Very short answer type questions $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <div> <h4 id="primaryvery-short-answer-type-questionsprimary"><Primary>Very Short Answer Type Questions</Primary></h4> </div>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-1"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Use of lead-free petrol or diesel is recommended to reduce the pollutants emitted by automobiles.</p> <ul> <li>What role does lead play?</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-2"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> Catalytic converters, having expensive metals namely platinum, palladium and rhodium as the catalysts are fitted into automobiles for reducing emission of poisonous gases and to convert unburnt hydrocarbons into $CO_{2}$ and $H_{2} O$.</p> <ul> <li>Motor vehicles equipped with catalytic to converter need to use unleaded petrol because lead in the petrol, inactivates the catalyst and increases the hydrocarbon emission, there by harming the environment.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-3"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> In which year was the Air (Prevention and Control of Pollution) Act amended to include noise as air pollution.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-4"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> In 1987, the Air (Prevention and Control of Pollution) Act was amended to include noise as a source of air pollution.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-5"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Name the city in our country where the entire public road transport runs on CNG.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-6"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> In Delhi, the entire public surface transport especially road transport runs on compressed Natural Gas (CNG)</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-7"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> It is a common practice to undertake desilting of the overhead water tanks.</p> <ul> <li>What is the possible source of silt that gets deposited in the water tanks?</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-8"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> The source of silt that get deposited in overhead water tank are soil particles, which are carried out with water from the source of supply like deep borewell, rivers, etc.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-9"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> What is cultural eutrophication?</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-10"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> The phenomenon wherein <strong>effluents</strong> from the industries and homes accelerate the natural and cultural ageing process of lakes and other water bodies that normally may take thousands of years is called accelerated <strong>eutrophication</strong></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-11"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> List any two adverse effects of particulate matter on human health.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-12"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> The fine particulate (PM of size $2.5 \mu \mathrm{m}$ or less) can problems cause</p> <p>(i) Breathing and respiratory</p> <p>(ii) Irritation</p> <p>(iii) Inflammations</p> <p>(iv) Damage to the lungs and premature death</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-13"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> What is the raw material for polyblend?</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-14"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> Polyblends are natural man made fibres, made by the mixture of two or more polymers especially plastic waste products</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-15"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Blends of polyblend and bitumen, when used, help to increase road life by a factor of three.</p> <ul> <li>What is the reason?</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-16"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> Polyblend is a fine powder of recycled modified plastic.</p> <ul> <li>The binding property of plastic makes the road last longer besides giving added strength to withstand more loads.</li> <li>This is because</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-17"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p>(i) Plastic increases the melting point of the bitumen which would prevent it from melting in India’s hot and extremely humid climate, where temperature frequently cross $50^{\circ} \mathrm{C}$.</p> <p>(ii) Rainwater will not seep through because of the plastic in the tar.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-18"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Mention any two examples of plants used as wind breakers in the agricultural fields.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-19"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> Wind breakers or shelter belts provide shelter from wind and protect soil from erosion.</p> <ul> <li>Jamun and imli and some other trees like babul, Lawsonia, Thevetia and Calotropis acts as wind breakers in the agricultural field.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-20"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Name an industry which can cause both air and thermal pollution and as well as eutrophication.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-21"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> Chemical fertiliser unit, thermal power plant, refineries, smelting and metallurgical processing units steel mills, and the industries using steam or water as coolant causes both air and thermal pollution.</p> <ul> <li>The chemical release form these Industries (if rich in nitrogen and phosphorus) may result in eutrophication.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-22"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> What is an algal bloom?</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-23"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> The extensive growth of <strong>planktonic</strong> (free-floating) algae in water bodies due to the presence of organic matter in water (cnitrogen and phosphores) that acts as a food source is called an algal bloom.</p> <ul> <li>This imparts a distinct colour to the water bodies.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-24"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> What do you understand by biomagnification?</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-25"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> <strong>Biomagnification</strong> refers to the increase in the concentration of the toxic substances at successive trophic level Is in the food chain.</p> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-26"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <ul> <li>This happens because a toxic substance accumulated by an organism cannot be metabolised or excreted and when this organism is eaten up by another animal of higher trophic level, it is passed on to this and then to the next higher trophic level and so on.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-27"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> What are the three major kinds or impurities in domestic wastewater?</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-28"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> The three major kinds of impurities in domestic waste water are</p> <p>(i) Dissolved salts such as nitrates, phosphates, other nutrients, toxic, metal ions and organic compounds.</p> <p>(ii) Biodegradable organic matter.</p> <p>(iii) Pathogenic microorganisms.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-29"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> What is reforestation?</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-30"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> Reforestation is the process of restoring a forest that had once existed but was removed at some point of time in the past.</p> <ul> <li>Though, it can occur naturally in a deforested area but we can expedite it by planting trees with due consideration to biodiversity that earlier existed in that area.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-31"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> What is the best solution for the treatment of electronic wastes?</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-32"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> The best solution for the treatment of electronic wastes is to recycle it.</p> <ul> <li>Electronic waste recycling facilities have advanced considerably and now they can be recycled $95-98 \%$ by weight.</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryvery-short-answer-type-questionsprimary-33"><Primary>Very Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <ul> <li><strong>Recycling has two fold benefits</strong></li> </ul> <p>(i) It prevents the toxic components of computers from entering the delicate environment and ground water via landfill.</p> <p>(ii) It also slows the use and mining of primary raw materials.</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ <span style="color:blue">Very short answer type questions</span> $\rightarrow$ Short answer type questions $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <div> <h4 id="primaryshort-answer-type-questionsprimary"><Primary>Short Answer Type Questions</Primary></h4> </div>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryshort-answer-type-questionsprimary-1"><Primary>Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Is it true that carpets and curtains/drapes placed on the floor or wall surfaces can reduce noise level.</p> <ul> <li>Explain briefly?</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryshort-answer-type-questionsprimary-2"><Primary>Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> Yes, it is true, that the placing/using carpets on floor and curtains on wall surface, windows, reduces noise level.</p> <ul> <li>This is because the curtains and carpets on wall surface and carpet acts as muffling device and absorb sounds of moderate level.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryshort-answer-type-questionsprimary-3"><Primary>Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> What is hybrid vehicle technology?</p> <ul> <li>Explain its advantages with a suitable example?</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryshort-answer-type-questionsprimary-4"><Primary>Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> The technology used to run vehicles on dual mode like petrol or compressed natural gas is said to be hybrid vehicle technology.</p> <ul> <li>These vehicles runs on either petrol or CNG.</li> <li>As CNG is a clean and green fuel so it is helpful to reduce environmental pollution and also to conserve petrol, fossil fuel.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryshort-answer-type-questionsprimary-5"><Primary>Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Is it true that if the dissolved oxygen level drops to zero, the water will become septic.</p> <ul> <li>Give an example which could lower the dissolved oxygen content of an aquatic body.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryshort-answer-type-questionsprimary-6"><Primary>Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> Yes, it is true, in case of zero level of dissolved oxygen (DO), the water becomes septic.</p> <ul> <li>Organic pollution like fertiliser in aquatic bodies is responsible for lowering (upto zero) the level of dissolved oxygen.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryshort-answer-type-questionsprimary-7"><Primary>Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Name any one green house gas and its possible source of production on a large scale.</p> <ul> <li>What are the harmful effects of it?</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryshort-answer-type-questionsprimary-8"><Primary>Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> The common green house gases are $CO_{2}, CH_{4}, CFC$, oxide of nitrogen $\left(N_{2} O\right)$, water vapour and $O_{3}$.</p> <ul> <li>The level of $CO_{2}$ (green house gas) is increasing due to large scale deforestation, change in land use and unlimited buring of fossils fuel and is leading to global warming.</li> </ul> <p><Success>Ans. to be continued</Success></p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryshort-answer-type-questionsprimary-9"><Primary>Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <ul> <li>The source of methane and other main green house gases are garbage dump, incomplete decomposition by anaerobic methanogens, flooded paddy field and marshy land.</li> <li>About 90-95 % of $\mathrm{CH}_{4}$ is produced/generated by rice fields of Asia.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryshort-answer-type-questionsprimary-10"><Primary>Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> It is a common practice to plant trees and shrubs near the boundary walls of buildings.</p> <ul> <li>What purpose do they serve?</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryshort-answer-type-questionsprimary-11"><Primary>Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ans.</strong> A common practice to grow and maintain trees and shrub near the boundary wall of residential, official building acts as a barrier for sound and check noise pollution.</p> <ul> <li>This green belt of tree and shrub also acts as an effective measure to check primary air pollutants like dust, flyash, etc.</li> </ul> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions </div> </font>

<div style='text-align : center'> <Success><font size="5"><b>Environmental Issues</b></font></Success> </div> <h4 id="primaryshort-answer-type-questionsprimary-12"><Primary>Short Answer Type Questions</Primary></h4> <hr> <div class="text-container"> <p><strong>Ques.</strong> Why has the National Forest Commission of India recommended a relatively larger forest cover for hills than for plains?</p> </font> </div> <hr> <font size ="4"> <div style='text-align : center'> Multiple choice questions (MCQs) $\rightarrow$ Very short answer type questions $\rightarrow$ <span style="color:blue">Short answer type questions</span> $\rightarrow$ Long answer type questions </div> </font>