Arrange the reactions given below in proper sequence for the conversion of ethane to methane.
(a) Treatment with sodium hydroxide
(b) Treatment with aqueous $K O H$
(c) Treatement with $N a O H + C a O$
(d) Halogenation
(e) Reaction with acidified $K_{2} {C r}_{2} O_{7}$

e a d b c

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d b e a c

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e c b a d

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d e a b c

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Solution

The correct option is D $d e a b c$
for the conversion of ethane to methane.
(d) Halogenation $\Rightarrow C H_{3} - C H_{3} \to C H_{3} - C H_{2} - C l$
(e) Reaction with acidified $K_{2} {C r}_{2} O_{7}$ $\Rightarrow C H_{3} - C H_{2} C l \to C H_{3} - C O O H$
(a) Treatment with sodium hydroxide $\Rightarrow C H_{3} - C O O H + N a O H \to C H_{3} - C O O N a$
(b) Treatment with aqueous $K O H$ $\Rightarrow C H_{3} - C O O N a \to C H_{4} (a q)$
(c) Treatement with $N a O H + C a O$ $\Rightarrow C H_{4} (a q) \to C H_{4}$

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