Question

Assertion :1 mole of 90% limestone on complete decomposition produce 50 g of $C{O}_2$. Reason: Stoichiometric coefficients for $CaC{O}_3$ and $C{O}_2$ in the reaction are 1 and 1 each.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is D Assertion is incorrect but Reason is correct

Limestone is calcium carbonate $\left(CaC{O}_3\right)$ which when heated to above 840°C decomposes into calcium oxide $\left(CaO\right)$ while releasing carbon dioxide $\left(C{O}_2\right)$ according to the equation:

$CaC{O}_3\left(s\right)$ → $CaO\left(s\right)$ + $C{O}_2\left(g\right)$.

from the above balanced chemical equation we find that

stoichiometric coefficients for $CaC{O}_3$ and $C{O}_2$ in the reaction are 1 and 1 each.

and ,

on doing mole-mole analysis we get 44 g of $C{O}_2$ is produced.

hence option D is correct.