Statement (I) : Gas thermometers are less sensitive than liquid thermometers. Statement (II) : The ratio of universal gas constant and avagadro's number is called Boltzman's constant. Statement (III) : The density of a

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Correct answer: C. Statements II, III are true, but statement I is false.

Thermal expansion in gases is more than thermal expansion in liquids. Therefore, gas thermometers are more sensitive than liquid thermometers.
The ratio of universal gas constant and avagadro's number is called Boltzman's constant.& $k = \dfrac{R}{NA}$
At constant pressure,~ $V ∝ T$ & therefore, the density of a given mass of a gas at constant pressure is inversely proportional to its absolute temperature.

Statement (I) : Gas thermometers are less sensitive than liquid...

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