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  • Select correct statementOption: 1 Unit of pre-exponential factor(A) for a second order reaction is <img alt="mol\, C^{-1}\, S^{-1}" src="https:/

Select correct statement

Option: 1

Unit of pre-exponential factor(A) for a second order reaction is mol\, C^{-1}\, S^{-1}


Option: 2

A zero order reaction must be a complex reaction


Option: 3

Molecularity is defined only for RDS in a complex reaction


Option: 4

Decay constant (\lambda) of radioactive substance is affected by temperature.


Answers (1)

best_answer

Molecularity -

The number of reacting species (atoms, ions, or molecules) taking part in an elementary reaction that must collide simultaneously in order to bring about a chemical reaction is Molecularity.

Description:

NH_{4}NO_{2}\rightarrow N_{2}+2H_{2}O (unimolecular)

H_{2}+I_{2}\rightarrow 2HI (bimolecular)

2NO+O_{2}\rightarrow 2NO_{2} (trimolecular)

Molecularity is the theoretical concept. It cannot be zero/non-integer

 Hence, the answer is (2).

 

Posted by

vinayak

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