Question

Assertion (A): In a gaseous reaction, the ratio of volumes of reactants and gaseous product is in agreement with their molar ratio.

Reason (R): Volume of gas is inversely proportional to its moles at a particular temperature and pressure.

Options

• If both A and R are true, and R is the correct explanation of A.

• If both A and R are true, but R is not the correct explanation of A.

• If A is true, but R is false.

• If both A and R are false.

Answer 1

If A is true, but R is false.

Explanation:

The assertion is true because, according to Gay-Lussac’s Law of Combining Volumes, gases react in simple whole-number volume ratios which directly match their stoichiometric molar ratios. The reason is completely false because Avogadro’s Law states that the volume of a gas is directly proportional to its number of moles at a constant temperature and pressure, not inversely proportional.