Q.

For a constant volume gas thermometer select the correct statement.

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a

It doesn’t use mercury for pressure measurement

b

We actually measure the pressure at constant volume and the scale is calibrated to give the temperature reading

c

Any high density gas can be used

d

Pressure ∝ Temp2

answer is B.

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Detailed Solution

A constant volume gas thermometer has a mercury manometer connected to a gas bulb. With increase in temperature of the bulb, its volume is kept constant by external methods and the pressure of gas increases. The temperature scale is defined as a function of this pressure. (T = kP, where k is a constant).
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For a constant volume gas thermometer select the correct statement.