Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • I have a doubt, kindly clarify. - Decomposition of X exhibits a rate constant of 0.05. How many years are required for the decomposit - Chemical kinetics - JEE Main

Decomposition of X exhibits a rate constant of 0.05 \mu g/year. How many years are required for the decomposition of 5 \mu g of X into 2.5 \mu g ?

  • Option 1)

    25

  • Option 2)

    40

  • Option 3)

    20

  • Option 4)

    50

Answers (1)

best_answer

 

Rate Determining Step -

The overall rate of reaction is controlled by the slowest step in a reaction called the rate determining step.

- wherein

e.g.

2H_{2}O_{2}\xrightarrow[alkaline\ medium]{I^{-}}2H_{2}O+O_{2}

r=\frac{-d[H_{2}O_{2}]}{dt}=K[H_{2}O_{2}][I^{-}]

H_{2}O_{2}+I^{-}\underset{slow}{\rightarrow}H_{2}O+IO

H_{2}O_{2}+IO^{-}\underset{fast}{\rightarrow}H_{2}O+I+O_{2}^{-}

As wehave learned in zero order reaction unit of rate constant it is zero order reaction then half life of the reaction will be

t_{\frac{1}{2}}= \frac{c_{o}}{2k}=\frac{5\mu g}{2\times 0.05\mu g}/year=50years

 


Option 1)

25

Option 2)

40

Option 3)

20

Option 4)

50
Posted by

admin

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 2024 session 2 result date announced; Steps to check NTA session 2 scores
anam-khan

JEE Main 2024 session 2 final answer key soon at jeemain.nta.ac.in; result on April 25
anam-khan

JEE Main 2024 Session 2: Last day to challenge answer key today

Latest Question