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Thermometry, Thermal Expansion and Calorimetry — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsThermometry, Thermal Expansion and Calorimetry1 Mark
MCQ
Absolute zero $(0 \mathrm{~K})$ is that temperature at which
  • A
    Matter ceases to exist
  • B
    lce melts and water freezes
  • ✓
    Volume and pressure of a gas becomes zero
  • D
    None of these
✓

Answer

Correct option: C.
Volume and pressure of a gas becomes zero
We know that $P=P_0(1+\gamma t)$ and $V=V_0(1+y t)$ and $v=\left(\frac{1}{273^{\circ}}{ }^{\circ} C\right).$ for $t=-273^{\circ} C$,
we have $P=0$ and $V=0$
Hence, at absolute zero, the volume and pressure of the gas become zero.

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