________ step in the sequence of elementary reactions determines the measured reaction rate.
First
Last
Slowest
Fastest
______ of a reaction is given by the total number of molecules of the reactants taking part in the reaction.
Rate
Order
Molecularity
Power
__________ equation represents the half life of a first order reaction.
t 1/2= 0.693/k
t 1/2 = k/0.693
+ 1/2 = 0.693 x k
K = 0.693 x t 1/2
A first order reaction is found to have a rate constant equal to 6.93 x 10 -14 sec -1. The half life of the reaction is
3.42 x 10 -14 sec -1
3.42 x 10 14 sec
1 x 10 15 sec
1 x 10 13 sec
_______ is the minimum total kinetic energy that molecules must bring to their collision for a chemical reaction to occur.
Activation energy
Potential energy
Electronic energy
Vibrational energy
In Homogeneous catalysis, the catalyst action is proportional to the _______ of the catalyst.
Temperature
pressure
concentration
Diffusion
____________ may be defined as a reaction which occurs with the loss of some simple molecules such as water, HX etc and the formation of a multiple bend.
Addition Reaction
Substitution Reaction
Rearrangement reaction
Elimination Reaction
____________ is a Substance which changes the rate of a chemical reaction remaining unchanged itself chemically and quantitatively.
Reactants
Products
Catalysts
Inhibitors
The half life of a reaction is to minutes. If the reaction is first order overall, its rate constant is
0.0693 min -1
0.0693 min
6.93 min -1
6.93 min
_______ is an electron - pair acceptor that reacts at centers of high electron density.
Nucleophile
Electrophile
Hydrophilic
Lyophilic
