IIT Jam Chemistry Study Material. We covered all the IIT Jam Chemistry Study Material in this post for free so that you can practice well for the exam.
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IIT Jam Chemistry Objective Study Material for Students
By the action of enzymes, the rate of biochemical reaction
(A) Increases
(B) Decreases
(C) Same
(D) Does not change
Option a – Increases
For a first-order reaction, the time taken to reduce the initial concentration by a factor of 1/4 is 20 min. The time required to reduce initial concentration by a factor of 1/16 is
(A) 20 min
(B) 80 min
(C) 10 min
(D) 40 min
Option d – 40 min
In a zero-order reaction, for every 10°C rise in temperature, the rate is doubled. If the temperature is increased from 10°C to 100°C, the rate of the reaction will become
(A) 256 times
(B) 512 times
(C) 64 times
(D) 128 times
Option b – 512 times
The salient feature of the theory of absolute reaction rates is the
(A) formation of the activated complex
(B) collision of the reactant molecules
(C) matching potential energy of the reactant molecules
(D) decrease of entropy of the reactant molecules
Option a – formation of the activated complex
The half-life of the reaction is halved as the initial concentration of the reactant is doubled. The order of the reaction is
(A) 0.5
(B) 1
(C) 2
(D) 0
Option c – 2
The temperature coefficient of a reaction is
(A) a Specific reaction with a rate of 25°C
(B) a Rate of the reaction at 100°C
(C) a Ratio of the rate constants at temperatures 35°C and 25°C.
(D) The ratio of the rate constants temperatures differing by 1°C.
Option c – a Ratio of the rate constants at temperatures 35°C and 25°C
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