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In a closed flask of 5 litres, 1.0 g of H2 is heated from 300 to 600 K. Which statement is not correct?

1. Pressure of the gas increases
2. The rate of collision increases
3. The number of moles of gas increases
4. The energy of gaseous molecules increases

Correct answer: The number of moles of gas increases

Solution

The number of moles of gas does not change because the amount of H2 remains constant; only temperature and pressure change.

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