Which of the following is correct regarding adiabatic process
(i) In adiabatic process, all the three variables, P, V and T changes
(ii) In adiabatic process, the heat exchanged between system and surrounding is zero i.e., `DeltaQ=0`
(iii) Since `DeltaQ=nCDeltaT`, therefore for adiabatic process molar specific heat `C=0`
(iv) If a gas is suddenly expanded adiabatically temperature falls and if gas is adiabatically compressed, temperature rises

Options

A. (i),(iii)
B. (ii),(iii)
C. (iii),(iv)
D. all

Answer

D