For a constant volume gas thermometer select the correct statement.

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It doesn’t use mercury for pressure measurement

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

Any high density gas can be used

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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