Home
Class 12
CHEMISTRY
Mechanism of hypothetical reaction X(2...

Mechanism of hypothetical reaction `X_(2)+Y_(2)rarr2XY` is given below:
(i) `X_(2)rarrX+X` (fast)
(ii) `X+Y_(2)hArrXY +Y` (slow)
(iii) `X+YrarrXY ` (fast)
The overall order of the reaction will be -

A

2

B

0

C

`1.5`

D

1

Text Solution

Verified by Experts

The correct Answer is:
C
The question is solved by considering the step (i) to be in equilibrium (This is not given in the question ).
According to the law of mass action , `r=k[X][Y_(2)],`
where k = rate constant of step (ii).
From step (i) we get , `k_(eq)=([X]^(2))/([X_(2)])` , where
`k_(eq)` = equilibrium constant of step (i)
`therefore[X]^(2)=k_(eq)[X_(2)]" or, "[X]=sqrt(k_(eq))xx[X_(2)]^(1//2)`
The expression of r becomes
`r=ksqrt(k_(eq))[X_(2)]^(1//2)[Y_(2)] " or, "r=k'[X_(2)]^(1//2)[Y_(2)]`
`therefore` The overall order of the reaction = 1 + 0.5 = 1.5
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    CHHAYA PUBLICATION|Exercise ENTRANCE Question Bank (AIIMS)|14 Videos

  • CHEMICAL KINETICS

    CHHAYA PUBLICATION|Exercise SOLVED NCERT EXEMPLAR PROBLEMS (Multiple Choice Question) (Single Correct Type)|17 Videos

  • CHEMICAL KINETICS

    CHHAYA PUBLICATION|Exercise ENTRANCE Question Bank (JEE-MAIN)|8 Videos

  • BIOMOLECULES

    CHHAYA PUBLICATION|Exercise Practic Set 29|1 Videos

  • CHEMICAL THERMODYNAMICS

    CHHAYA PUBLICATION|Exercise Practice Set 6|15 Videos

Similar Questions

Explore conceptually related problems

Mechanism of a hypothetical reaction X_(2) + Y_(2) to 2 XY is given below : (i) X_(2) to X + X (fast) (ii) X + Y_(2) hArr XY+ Y (slow) (iii) X + Y to XY (fast) The overall order of the reaction will be -

A hypothetical reaction A_2 + B_2 rarr 2AB follows the following given mechanism : A_2 iff A+A (fast) A+B_2 rarr AB +B (slow) A+B rarr AB (fast) The order of the overall reaction will be :

In hypothetical reaction A_2+B_2 = 2AB follows the mechanism as given below: A_2 iff A+A (fast reaction) A+B_2 to AB+B (slow reaction) A+B to AB (fast reaction) give the rate law and order of reaction.

If log_(y) x + log_(x) y = 2, x^(2)+y = 12 , then the value of xy is

Which of the following pair of graphs intersect ? (i) y = x^(2) - x and y = 1 (ii) y = x^(2) - 2x + 3 and y = sin x (iii) y = x^(2) - x + 1 and y = x - 4

The fourth proportional of x - y , x^(2) - y^(2) " and " x^(2) - xy + y^(2) is

y = sqrt(1 + x^(2)) : y' = (xy)/(1 + x^(2))

For the assumed reaction X_ 2+ 2Y _2 to 2XY_2 , write the rate equation in terms of the rate of disappearance of Y_2 .