The number of degree of freedom for an Azeotropic mixture of ethanol and water in vapourliquid equilibrium, is__________________?

A. 0
B. 1
C. 2
D. 3

A. The energy change of a system undergoing any reversible process is zero
B. It is not possible to transfer heat from a lower temperature to a higher temperature
C. The total energy of system and surrounding remains the same
D. None of the above

A. +ve
B. 0
C. -ve
D. ∞

A. Two isothermal and two isentropic
B. Two isobaric and two isothermal
C. Two isochoric and two isobaric
D. Two isothermals and two isochoric

A. Sublimation
B. Vaporisation
C. Melting
D. Either A, B. or C.