Q1: At higher temperature, molal heat capacities of most of the gases (at constant pressure) __________ with increase in temperature.

ANS:A - increases

At higher temperatures, the molal heat capacities of most gases (at constant pressure) typically increase with an increase in temperature. This increase occurs because at higher temperatures, gases generally possess higher average kinetic energies due to increased molecular motion. As a result, they have more internal energy associated with translational, rotational, and vibrational motion, leading to an increase in heat capacity. Therefore, the correct answer is "increases".