Chemistry
Assertion (A): One mole of a gas occupies 24.4 litres at S.T.P.
Reason (R): The mass of one mole of a gas is equal to its molecular mass.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Answer
A is false but R is true.
Explanation — At S.T.P. (Standard Temperature and Pressure), one mole of a gas actually occupies 22.4 litres, not 24.4 litres, so Assertion (A) is false.
Reason (R) is true because by definition, the mass of one mole of a substance equals its molecular mass in grams.
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