Question

Assertion (A) Percentage of carbon can be estimated by using the formula $\frac{12 \times m_{2} \times 100}{44 \times m}$
Reason (R) Molar mass of carbon dioxide is $12$ .

• A. Both $A$ and $R$ are correct; $R$ is the correct explanation of $A$.
• B. Both $A$ and $R$ are correct; $R$ is not the correct explanation of $A$.
• C. $A$ is correct; $R$ is incorrect.
• D. $R$ is correct; $A$ is incorrect.

Answer 1

Answer: (C)

Percentage of carbon can be calculated by following relation:
$\%$ of carbon $=\frac{12 \times m_{2} \times 100}{44 \times m}$
Molar mass of $CO _{2}=12+2 \times 16=44 u$
Thus, $A$ is correct but $R$ is incorrect.