Thermodynamic process are indicated in the following diagram 

  Match the following:

             column-I            column-II

P.        Process-I      (a)    Adiabatic

Q.       Process-II      (b)   Isobaric 

R.       Process-III     (c)   Isochoric

S.       Process-IV     (d)   Isothermal

(a) $P\to a,Q\to c,R\to d,S\to b$

(b)$P\to c,Q\to a,R\to d,S\to b$

(c)$P\to c,Q\to d,R\to b,S\to a$

(d)$P\to c,Q\to d,R\to b,S\to a$

One mole of an ideal gas from an initial state B undergoes via two processes. It first undergoes isothermal expansion from volume V to 3V and then its volume is reduced from 3V to V at constant pressure. The correct p-V diagram representing the two processes is -

A mass of diatomic gas ($\gamma$=1.4) at a pressure of 2 atm is compressed adiabatically so that its temperature rise from $27°\mathrm{C}$ to $927°\mathrm{C}.$ The pressure of the gas is final state is-

(a) 28 atm                                            (b) 68.7 atm

(c) 256 atm                                           (d) 8 atm