Question

50 g limestone is heated. The quantity of quicklime produced is:

• A. 56 g
• B. 28 g
• C. 14 g
• D. 10 g

Answer 1

Answer: (B)

28 g

$CaC{O}_3\to CaO+C{O}_2$

When 100 grams of $CaC{O}_3$ is heated 56 grams of quicklime that is $CaO$ is obtained.

If 50 grams of $CaC{O}_3$ is heated X grams of quicklime that is $CaO$ will be obtained.

$X=\frac{50\times 56}{100}=28g$

Hence option B is correct.