(a) Write the equation for the preparation of carbon tetrachloride from methane.
(b) Draw the structural formula of ethyne.
(c) How is the structure of alkynes different from that of alkenes ?

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Solution

(a) Preparation of carbon tetrachloride from methane:

$C H_{4} + C l_{2} 600 K - -------- \to Difused sunlight C H_{3} C l + H C l$

$C H_{3} C l + C l_{2} ⟶ C H_{2} C l_{2} + H C l$

$C H_{2} C l_{2} + C l 2 ⟶ C H C l_{3} + H C l$

$C H C l_{3} + C l_{2} ⟶ C C l_{4} + H C l$

(b) The structural formula of ethyne: $H - C \equiv C - H$

(c) Alkynes contain triple bond whereas alkenes contain a double bond.

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(a) Write the equation for the preparation of carbon tetrachloride from methane. (b) Draw the structural formula of ethyne. (c) How is the structure of alkynes different from that of alkenes ?

(a) Write the equation for the preparation of carbon tetrachloride from methane.
(b) Draw the structural formula of ethyne.
(c) How is the structure of alkynes different from that of alkenes ?