States of Matter - Result Question 26
####26. In a closed flask of 5 litres, $1.0 g$ of $H_2$ is heated from 300 to $600 K$. Which statement is not correct?
(a) Pressure of the gas increases
[1991]
(b) The rate of collision increases
(c) The number of moles of gas increases
(d) The energy of gaseous molecules increases
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Solution:
- (c) The number of moles of gas do not changes.
Volume is constant and the mass of $H_2$ is fixed so the number of moles of the gas do not change. As temperature increases the pressure also increases and the rate of collision among the gas molecules and their energy also increases.
