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MCQEasyJEE Main 2025 · 7 April, Shift 2Internal Energy & Enthalpy

The correct statement amongst the following is :

A
The term 'standard state' implies that the temperature is $0^\circ C$
B
The standard state of pure gas is the pure gas at a pressure of $1 \, \text{bar}$ and temperature $273 \, \text{K}$
C
$\Delta_f H_{298}^\ominus$ is zero for $O(g)$
D
$\Delta_f H_{500}^\ominus$ is zero for $O_2(g)$

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