Assertion: Volume of a gas is inversely proportional to the number of moles of a gas.
Reason: The ratio by volume of gaseous reactants and products is in agreement with their molar ratio.

Options

A. (a)If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. (b)If both assertion and reason are true and the reason is not the correct explanation of the assertion.
C. (c )If assertion is true but reason is false.
D. (d)If assertion is false but reason is true.

Answer

D

Explanation

We know that from the reaction `H_(2)+Cl_(2) rarr 2HCl` that the ratio of the volume of gaseous reactants and products is in agreement with their molar ratio. The ratio of `H_(2):Cl_(2):HCl` volumes is `1:1:2` which is the same as their molar ratio. Thus volume of gas is directly related to the number of moles. Therefore, the assertion is false but reason is true.