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Identify the characteristics of an adiabatic process in a monoatomic gas. (A) Internal energy is constant. (B) Work done in the process is equal to the change in internal energy. (C) The product of temperature and volume is a constant. (D) The product of pressure and volume is a constant. (E) The work done to change the temperature from T 1 to T 2 is proportional to (T 2 – T 1 ). Choose the correct answer from the options given below :

1. (A), (C), (E) only
2. (B), (E) only
3. (A), (C), (D) only
4. (B), (D) only

Correct answer: (B), (E) only

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