The volume of a gas at \( 20^{\circ} \mathrm{C} \) is \( 100 \mathrm{~cm}^{3} \) at normal press...

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The volume of a gas at \( 20^{\circ} \mathrm{C} \) is \( 100 \mathrm{~cm}^{3} \) at normal pressure. If it is heated to \( 100^{\circ} \mathrm{C} \), its volume becomes \( 125 \mathrm{~cm}^{3} \) at the same pressure, then volume coefficient of the gas at normal pressure is
[DPMT 2001; Pb. PET 2002]
(a) \( 0.0015 /{ }^{\circ} \mathrm{C} \)
(b) \( 0.0045 /{ }^{\circ} \mathrm{C} \)
(c) \( 0.0025 /{ }^{\circ} \mathrm{C} \)
(d) \( 0.0033 /{ }^{\circ} \mathrm{C} \)
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