The correct match between items of List-I and List-II is :

List - I		List - II
(A)	Coloured impurity	(P)	Steam distilation
(B)	Mixture of o-nitrophenol and p-nitrophenol	(Q)	Fractional distilation
(C)	Crude Naphtha	(R)	Charcoal treatment
(d)	Mixture of glycerol and sugars	(S)	Distillation under reduced pressure

Which of the following is the correct structure of Adenosine?

In hydrogen azide (above) the bond orders of bond (I) and (II) are :

An ideal gas undergoes a cyclic process as shown in Figure.


$$\Delta $$U_BC = $$-$$5 kJ mol^-1, q_AB = $$2$$ kJ mol^-1, W_AB = $$-$$5 kJ mol^-1, W_CA = 3 kJ mol^-1. Heat absorbed by the system during process $$CA$$ is :