SATHEE: Some Basic Concepts Of Chemistry Question 139

Some Basic Concepts Of Chemistry Question 139

Question: Calculate the weight of lime (CaO) obtained by heating 200 kg of 95% pure lime stone $(C a C O_{3}) .$

Options:

A) 104.4 kg

B) 105.4 kg

C) 212.8 kg

D) 106.4 kg

Show Answer

Answer:

Correct Answer: D

Solution:

[d] $∵$ 100 kg impure sample has pure $C a C O_{3}$ = 95 kg

$∴$ 200 kg impure sample has pure $C a C O_{3}$

$= \frac{95 \times 200}{100} = 190, k g$

$C a C O_{3} \to C a O + C O_{2}$

$∵$ 100 kg $C a C O_{3}$ gives $C a O = 56, k g$ .

$∴$ 190 kg $C a C O_{3}$ gives $C a O = \frac{56 \times 190}{100} = 106.4, k g$ .

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Some Basic Concepts Of Chemistry Question 139

Question: Calculate the weight of lime (CaO) obtained by heating 200 kg of 95% pure lime stone (CaCO3).

Options:

Answer:

Solution:

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Question: Calculate the weight of lime (CaO) obtained by heating 200 kg of 95% pure lime stone $(C a C O_{3}) .$