0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

Select the chain propagation steps in the free-radical chlorination of methane.
(1)Cl22Cl
(2) Cl+CH4CH3C1+H
(3) C1+CH4CH3+HCI
(4) H+Cl2HCl+Cl
(5) CH3+Cl2CH3CI+Cl

  1. 2,3,4
  2. 2,3,5
  3. 1,3,6
  4. 3,5

A
3,5
B
1,3,6
C
2,3,4
D
2,3,5
Solution
Verified by Toppr

The correct option is C 3,5
(1) Cl22Cl [Initiation]
(2) Cl+CH4CH3Cl+H
(3) Cl+CH4CH3+HCl [Propagation]
(4) H+Cl2HCl+Cl
(5) CH3+Cl2CH3Cl+Cl [Propagation]
In the first propagation step (3), a Cl combines with a hydrogen on CH4 giving HCl and CH3. In the 2nd propagation step (5) Cl2 combines with CH3 to form CH3Cl and Cl.

Was this answer helpful?
2
Similar Questions
Q1
Select the chain propagation steps in the free-radical chlorination of methane.
(1)Cl22Cl
(2) Cl+CH4CH3C1+H
(3) C1+CH4CH3+HCI
(4) H+Cl2HCl+Cl
(5) CH3+Cl2CH3CI+Cl

View Solution
Q2
Select the chain propagation steps in the free radical chlorination of methane.
(1)Cl22Cl(2)CH3+CH3CH3CH3(3)Cl+CH4CH3Cl+Cl(4)CH3+ClCH3Cl(5)CH3+Cl2CH3Cl+Cl
View Solution
Q3
Which of these steps are part mechanism for chlorination of ethane under free radical conditions?
I:CH3CH3+ClCH3CH2Cl+H
II:CH3CH3+ClCH3CH2+HCl
III:CH3CH2+Cl2CH3CH2Cl+Cl
IV:2ClCl2
View Solution
Q4
Consider two alternative mechanism for the chlorination of methane. Which step is crucial in deciding which mechanism is not likely to be observed?
Mechanism I Mechanism II
A Cl22Cl
A Cl22Cl
B Cl+CH4HCl+CH3
D Cl+CH4CH3Cl+H
C CH3+Cl2CH3Cl+Cl
E H+Cl2HCl+Cl

View Solution
Q5
Which step is chain propagation step in the following mechanism?
Cl2hvCl+Cl
Cl+CH4CH3+HCl
Cl+ClCl2
CH3+ClCH3Cl
View Solution