The hardness of a water sample (in terms of equivalents of CaCO₃) containing 10^–3 M CaSO₄ is (Molar mass of CaSO₄ = 136 g mol^–1)

In a chemical reaction,


the initial concentration of B was 1.5 times of the concentration of A, but the equilibrium concentrations of A and B were found to be equal. The equilibrium constant (K) for the aforesaid chemical reaction is -

The major product of the following reaction is

The correct order for acid strength of compounds :

CH $$ \equiv $$ CH, CH₃–C $$ \equiv $$ CH and CH₂ = CH₂ is as follows