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Question

STATEMENT – 1: Compressibility factor for hydrogen varies with pressure having a positive slope at all pressures when at 273 K. 
STATEMENT – 2: Even at low pressures, repulsive forces dominate in hydrogen gas at 273 K.
  1. Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1
  2. Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1
  3. Statement-1 is True, Statement-2 is False
  4. Statement-1 is False, Statement-2 is True


Solution

The correct option is A Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1
In the case of H2, compressibility factor increases with an increase in pressure. Even at 273 K, Z > 1 which shows that it is difficult to compress the gas when compared to an ideal gas. In this case, repulsive forces dominate.

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