Chemistry
Assertion (A): For a given amount of any gas, the product PV is always constant.
Reason (R): Pressure is inversely proportional to volume at constant temperature.
- 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.
Gas Laws
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation— The product of pressure and volume of a given mass of a gas is constant if the temperature remains constant. This can be deduced by platting values of P against values of PV at a constant temperature. Hence, the assertion (A) is true. Volume of a given mass of a dry gas is inversly proportional to its pressure at constant temperature. Hence, the reason (R) is true.
Reason (R) states boyle's law, which explains 'the product of volume and pressure of a given masss of a dry gas at constant temperature is constant. Hence, reason (R) is the correct explanation of assertion (A).
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Related Questions
Assertion (A): Gases diffuse easily and form homogeneous mixtures.
Reason (R): Molecules of other substances occupy the intermolecular spaces present in gases.
- Both A and R are true and R is the correct explanation of A.
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Assertion (A): At zero Kelvin (-273°C), the volume occupied by a gas is considered as zero.
Reason (R): Theoretically, molecular motion completely ceases at zero Kelvin.
- 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.
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Assertion (A): It is necessary to mention conditions while stating the volumes of gases.
Reason (R): The volume of a gas does not depend on any condition.
- Both A and R are true and R is the correct explanation of A.
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- A is true but R is false.
- A is false but R is true.
Match the following:
Column A Column A (a) Cm3 (i) Pressure (b) Kelvin (ii) PV = P1V1 (c) Torr (iii) Volume (d) Boyle’s law (iv) = (e) Charles law (v) = (vi) temperature