Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
0 votes

The time for half life period of a certain reaction. A - products is 1 hour when initial concentration of the reactant A is $2.0\; mol\; L^{-1}$, how much time does it take for its concentration to come from $0.50$ to $ 0.25\;mol L^{-1}$ if it is a zero order reaction ?

$(a)\;4\;hr \\ (b)\;0.5\;hr \\(c)\;0.25\;hr \\(d)\;1\;hr $
Can you answer this question?

1 Answer

0 votes
For a zero order reaction ,k= rate constant
When $t= t_{y_2},$ then $x= \large\frac{|A|_o}{2}$
Given that $[A_0]= 2M$
$t_{y_2}=1 hr,K=1$
$\therefore K= \large\frac{|A|_0}{2 \times ty_2} =\frac{2}{2 \times 1} $
$\qquad= 1 mol .L^{-1}.hr^{-1}$
Now, change in conc $(x)=0.50 -0.25$
$\qquad= 0.25\;M$
$\therefore t= \large\frac{x}{k} =\frac{0.25}{1} $$=0.25\;hr$
Hence c is the correct answer.
answered Apr 2, 2014 by meena.p

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, AIPMT Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App