QUESTION THREE (a) (i) Predict the intermediate and products of the following reaction. -CH3 RCN/ PMe3 Rh Me P H (ii) Identify the mechanism/s of this reaction. (iii) Describe fully, the mechanism of this reaction. (b) (i) State the principle of microscopic reversibility. (ii) Explain the use of principle of microscopic reversibility.

(b) Discuss, with reasoning, the validity of the following statements in NO MORE than 90 words for each part: (iii) Evidence that a bimolecular reaction occurs via a harpoon mechanism is that the observed rate of reaction is faster than predicted with simple collision theory.

The activation energy for the isomerization reaction ofCH3NC in Problem 14 is 161 kJ mol-1, and the reactionrate constant at 600 K is 0.41 s-1.(a) Calculate the Arrhenius factor A for this reaction.(b) Calculate the rate constant for this reaction at 1000 K.

1. Which of the following statements is incorrect? (A) The reaction in which the rate equation corresponds to a stoichiometric equation is called an elementary reaction. (B) Molecularity of a reaction may not be equal to the order of reaction. (C) With increase in temperature, the rate constant obeying Arrhenius equation decreases. (D) Rate of a chemical reaction is independent of the concentration of the reactants for a zero order reaction. 2. The rate of a gas phase reaction is given by, kCACB. If the volume of the reaction vessel is reduced to l/3rd of its initial volume, then the reaction rate compared to the original rate will be _____ times. (A) 3 (C) 6 (B) 9 (D) 12 3. A given number of molecules (i.e., moles) of a particular chemical species have reacted or disappeared when any of the following occurs except (A) Combination (C) Isomerization (B) Decomposition (D) Isolation Please Answer all!