Which of these steps are part mechanism for chlorination of ethane under free radical conditions- I- CH3CH3-Cl- CH3CH2Cl-H- II- CH3CH3-Cl- CH3CH2-HCl III- CH3CH2-Cl2- CH3CH2Cl-Cl- IV- 2Cl- Cl2

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Chlorination

Which of thes...

Question

Which of these steps are part mechanism for chlorination of ethane under free radical conditions?
$I : C H_{3} C H_{3} + C l^{} \to C H_{3} C H_{2} C l + H^{}$
$I I : C H_{3} C H_{3} + C l^{} \to C H_{3} C H_{2}^{} + H C l$
$I I I : C H_{3} C H_{2}^{} + C l_{2} \to C H_{3} C H_{2} C l + C l^{}$
$I V : 2 C l^{*} \to C l_{2}$

I I I

and

I V

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I, I I I

and

I V

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I . I I, I I I, I V, V

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I I, I I I, I V

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Solution

The correct options are
A $I I I$ and $I V$
B $I I, I I I, I V$
Chlorination of ethane occurs in three steps:
Chain initiation: $C l_{2} \to C l^{} + C l^{}$ .
Chain propagation: $C H_{3} C H_{3} + C l^{} \to C H_{3} C H_{2}^{} + H C l$
$C H_{3} C H_{2}^{} + C l_{2} \to C H_{3} C H_{2} C l + C l^{}$ .
Chain termination: $2 C l^{*} \to C l_{2}$ .
$I I$ and $I I I$ are propagation steps while $I V$ is one of the termination step.
Hence options A & D are correct.

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Similar questions

Q. Which of the following statement is correct regarding th following process?
(i)

C l \to C l^{-}

(ii)

C l^{-} \to C l

(iii)

C l \to C l^{+}

(iv)

C l^{+} \to C l^{2 +}

Q. Correct boiling point is:

C H_{3} C H_{2} - I I

C H_{3} C H_{2} - B r I i

C H_{3} C H_{2} - C l I i i

C H_{3} C H_{2} - F I V

Q. Question 27
The heteroatoms present in

C H_{3} — C H_{2} — O — C H_{2} — C H_{2} C l

are

(i) oxygen
(ii) carbon
(iii) hydrogen
(iv) chlorine

(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)

The order of -I power (-ve inductive effect ) of the following functional groups will be:

(i) $- S O_{3} H$

(ii) $- C l$

(iii) $- N H_{2}$

(iv) $- H$

Arrange the following: $C H_{3} C H_{2} C H_{2} C l (I), C H_{3} C H_{2} C H C l C H_{3} (I I) {(C H_{3})}_{2} C H C H_{2} C l (I I I) a n d {(C H_{3})}_{3} C - C l (I V)$ in order of decreasing tendency towards $S N^{2}$ reaction

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Which of these steps are part mechanism for chlorination of ethane under free radical conditions?I:CH3CH3+Cl∗→CH3CH2Cl+H∗II:CH3CH3+Cl∗→CH3CH∗2+HClIII:CH3CH∗2+Cl2→CH3CH2Cl+Cl∗IV:2Cl∗→Cl2