Chemistry
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.
- 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
A is true but R is false.
Explanation— For a given mass of a gas, a change in one or more than one variable, i.e., pressure, volume and temperature, results in a change in the remaining variables. So it is necessary to mention conditions while stating the volumes of gases. Hence, the assertion (A) is true. Volume of gas depends on changing pressure and temperature. Volume and temperature relate directly whereas, volume and pressure relate inversely. Hence, The reason (R) is false.
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Related Questions
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.
- A is true but R is false.
- A is false but R is true.
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.
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 Fill in the blanks:
(a) The average kinetic energy of the molecules of a gas is proportional to the ……………
(b) The temperature on the Kelvin scale at which molecular motion completely ceases is called ……………
(c) If the temperature is reduced to half, …………… would also reduce to half.
(d) The melting point of ice is …………… Kelvin.