SATHEE: Alcohols and Ethers - Result Question 32

Alcohols and Ethers - Result Question 32

####35. Statement I Solubility of $n$ -alcohol in water decreases with increase in molecular weight.

Statement II The relative proportion of the hydrocarbon part in alcohols increases with increasing molecular weight which permit enhanced hydrogen bonding with water.

$(1988, 2 M)$

Passage Based Questions

Passage 1

A tertiary alcohol $H$ upon acid catalysed dehydration gives a product $I$ . Ozonolysis of $I$ leads to compounds $J$ and $K$ . Compound $J$ upon reaction with $K O H$ gives benzyl alcohol and a compound $L$ , whereas $K$ on reaction with $K O H$ gives only $M$ .

$(2008, 3 \times 4 M = 12 M)$

Show Answer

Answer:

Correct Answer: 35. secondary

Solution:

$R - O H \leftarrow$ Hydrophilic

Hydrophobic

Increasing molecular weight increases hydrocarbon $(R)$ proportion that lowers the solubility in water.

Passage 1

Compound $J$ must be benzaldehyde because it on treatment with $K O H$ undergoing Cannizzaro’s reaction producing benzyl alcohol and pot-benzoate $(L)$ .

$C_{6} H_{5} - C H O \overset{K O H}{\to} \underset{benzyl alcohol}{C_{6} H_{5} - C H_{2} O H} + C_{6} H_{5} C O O K (L)$

Also $M$ is aldol condensation product formed from acetophenone

acetophenone $(K)$

$\Rightarrow I = \underset{H_{3} C}{P h} ≻ C = C H - P h$

and $H = P h \underset{\begin{matrix} C H_{3} 3^{\circ} -alcohol \end{matrix}}{\overset{O}{∣} ∣} - C H_{2} - P h$

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Alcohols and Ethers - Result Question 32

Passage Based Questions

Passage 1

Answer:

Passage 1

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Alcohols and Ethers - Result Question 32

Passage Based Questions

Passage 1

Answer:

Passage 1

इंजीनियरिंग की तैयारी

चिकित्सा तैयारी

एनसीईआरटी पुस्तकें और समाधान

महत्वपूर्ण संसाधन

अन्य संसाधन

पाठ्यक्रम

परीक्षा मंच

नमूना मॉक टेस्ट

सदस्यता

एनसीईआरटी व्यायाम वीडियो समाधान

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