Among the following, the set of parameters that represents path function, is :
(A) q + w
(B) q
(C) w
(D) H–TS

The osmotic pressure of a dilute solution of an ionic compound XY in water is four times that of a solution of 0.01 M BaCl₂ in water. Assuming complete dissociation of the given ionic compounds in water, the concentration of XY (in mol L^–1) in solution is :

The correct IUPAC name of the following compound is :

The given plots represent the variation of the concentration of a reactant R with time for two different reactions (i) and (ii). The respective orders of the reactions are :