Home
Class 12
CHEMISTRY
The following mechanism has been propose...

The following mechanism has been proposed for the reaction of NO with `Br_(2)` to from NOBr.
`NO(g)+Br_(2)hArrNOBr_(2)(g)`
`NOBr_(2)(g)+NO(g)rarr2NOBr(g)`
If the second step is the rate determining step, the order of the reaction with respect to NO(g) is

A

1

B

0

C

3

D

2

Text Solution

Verified by Experts

The correct Answer is:
D
`NO(g) +Br_(2) (g) , NOBr_(2)(g) rArr NOBr_(2) (g) + NO (g) rarr 2NOBr (g)`
`R =k [NOBr_(2)] [NO] =k K_(c ) [NO] [Br_(2)] [NO]," where "K_(c ) =([NOBr_(2)])/([NO][Br_(2)])=k' [NO]^(2) [Br_(2)]`
Promotional Banner

Similar Questions

Explore conceptually related problems

The following mechanism has been propsoed for the reaction of NO with Br_(2) to form NOBr. NO(g) +Br_(2)(g) hArr NOBr_(2)(g), NOBr_(2)(g) +NO(g) rarr 2NOBr(g)" " (slow step) If the second step is the rate determining step, the order of the reaction with respect to NO(g) is:

The rate constant for the decompoistion of a certain reaction is described by the equation: log k(s^(-1)) = 14 - (1.25 xx 10^(4) K)/(T) A two-step mechanism has been suggested for the reaction of nitric oxide and bromine: NO(g) + Br_(2)(g) overset(k_(1))rarr NOBr_(2)(g) NOBr_(2)(g)+NO(g) overset(k_(2))rarr 2NOBr(g) The observed rate law is, rate = k[NO]^(2)[Br_(2)] . Hence, the rate-determining step is

For a reaction 2NO(g) +Cl_(2)(g) rarr 2NOCl(g) , when concentration of Cl_(2) is doubled, the rate becomes four times. What is the order of reaction with respect to Cl_(2) ?

Determining the overall reaction and the molecularity of an elementary reaction : The following two - step mechanism hqas proposed for the gas-phase decomposition of nitrous oxide (N_(2)O) : Step 1: N_(2)O(g)rarrN_(2)(g)+O(g) Step 2: N_(2)O(g)+O(g)rarrN_(2)(g)+O_(2)(g) (i) Write the chemical equation for the overall reaction (ii) Identify any reaction intermediates (iii) What is the molecularity of each of the elementary reactions ? (iv) What is the molecularity of the overvall reaction Strategy : The step-by -step pathway by which a reaction occurs is called its mechanism. Some reactions takes place in a single step, but most reactions occur in a series of elementary steps. To identify intermediates and molecularity, look at the indicidual steps

2NO_(2)(g) rarr 2NO(g) +O_(2)(g) For the reaction above, a straight line for which plot indicates a second order reaction ?