The correct option is
A a-4,b-1,c-2,d-3
a). reversible process is a process whose direction can be "reversed" by inducing infinitesimal changes to some property of the system via its surroundings, with no increase in entropy. Throughout the entire reversible process, the system is in thermodynamic equilibrium with its surroundings.
The best match is 4).a reversible process is a process whose direction can be "reversed" by inducing infinitesimal changes to some property of the system via its surroundings, with no increase in entropy. Throughout the entire reversible process, the system is in thermodynamic equilibrium with its surroundings.
b).An isothermal process is a change of a system, in which the temperature remains constant: ΔT = 0.best match is 1).Temperature remains constant
c).a process that is not reversible is called irreversible.An irreversible process increases the entropy of the universe. Because entropy is a state function, the change in entropy of the system is the same, whether the process is reversible or irreversible.best match is 2).Combustion reaction of mixture of petrol and air.
d).an adiabatic process is one that occurs without transfer of heat or matter between a thermodynamic system and its surroundings.best match is 3).No heat flow between the system and surrounding.