How are most probable kinetic energy and the energy of activation affected with increase in temperature.

OR

Explain the difference between instantaneous rate of a reaction and average rate of a reaction.

Note : A statement of assertion followed by a statement of reason is given. Choose the correct option out of the options given below each equation.

Assertion : Molarity of a solution in liquid state changes with temperature.

Reason : The volume of a solution changes with change in temperature.

Note : A statement of assertion followed by a statement of reason is given. Choose the correct option out of the options given below each equation.

Assertion : p-nitrophenol is more acidic than phenol.

Reason : Nitro group helps in the stabilisation of the phenoxide ion by dispersal of negative charge due to resonance.

Identify compounds A to E and also explain the reactions involved.

OR

A violet compound of manganese (A) decomposes on heating to liberate oxygen and compounds (B) and (C) of manganese are formed. Compound (C) reacts with KOH in the presence of KNO₃ to give compound (B). On heating compound (C) with a mixture of conc. H₂SO₄ and NaCl, chlorine gas is liberated and a compound (D) of manganese along with other products is formed. Identify compounds (A) to (D) and also explain the reaction involved.

An alkene ‘A’ (Molecular formula C₅H₁₀) on ozonolysis gives a mixture of two compounds ‘B’ and ‘C’. Compound ‘B’ gives positive Fehling’s test and also forms iodoform on treatment with iodine and NaOH solution. Compound ‘C’, does not give Fehling’s test but forms iodoform. Identify the compounds ‘A’, ‘B’ and ‘C’ giving suitable explanation and write the reactions of ozonolysis and iodoform formation from either ‘B’ or ‘C’. (5)

OR

Explain the reactivity of a-hydrogen atoms in ethanal. Write the reaction when (a) a mixture of ethanal and benzaldehyde is treated with NaOH (aq) and (b) when only benzaldehyde is treated with conc. KOH solution. Write the names of reaction in both the cases.