Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • The half life of a chemical reactant is 20 minutes at a certain initial concentration. When concentration is reduced to one-half, half life is observed to be 10 minutes.

The half life of a chemical reactant is 20 minutes at a certain initial concentration. When concentration is reduced to one-half, half life is observed to be 10 minutes. Order of reaction is

 

Option: 1

Zero 


Option: 2

First


Option: 3

Second 


Option: 4

Third


Answers (1)

best_answer

Half-time of a reaction \mathrm{t_1/_2 = [Ao]^{1-n}}   where Ao is initial concentration of reactant and n is order of reaction with respect to that reactant.

Since, the time for half reaction gets halved on halving the initial concentration of the reactants, half-time is proportional to intial concentration.

\mathrm{\begin{aligned} & \Rightarrow 1-n=1 \\ & \Rightarrow n=0 \end{aligned}}.

Posted by

sudhir.kumar

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2025 exam date soon; syllabus, previous year question papers, books for preparation
anam-khan

JEE Main 2025 exam date this month; updates on reduced syllabus, registration, number of attempts

Latest Question