Question

Match the column I with column II to identify the products of oxidation of alkanes and mark the appropriate choice.

Column I		Column II
(A)	$(C{H}_3{)}_{3}CH+2O_2\underset{(O)}{\overset{KMn{O}_4}{\to }}$	(i)	$HCOOH+H_{2}O$
(B)	$2C{H}_4+O_2\underset{100atm}{\overset{Cu/523K}{\to }}$	(ii)	$(C{H}_3{)}_{3}COH$
(C)	$C{H}_4+O_2\underset{\Delta }{\overset{M{o}_2{O}_3}{\to }}$	(iii)	$2C{H}_{3}OH$
(D)	$C{H}_4+\frac{3}{2}{O}_2\stackrel{(C{H}_{3}COO{)}_{2}Mn}{\to }$	(iv)	$HCHO+H_{2}O$

• A. (A) $\to$ (i), (B) $\to$ (ii), (C) $\to$ (iii), (D) $\to$ (iv)
• B. (A) $\to$ (ii), (B) $\to$ (iii), (C) $\to$ (iv), (D) $\to$ (i)
• C. (A) $\to$ (iv), (B) $\to$ (ii), (C) $\to$ (iii), (D) $\to$ (i)
• D. (A) $\to$ (iii), (B) $\to$ (i), (C) $\to$ (ii), (D) $\to$ (iv)

Answer 1

Answer: (B)

(A) $C{H}_4+2O_2\underset{(O)}{\overset{KMn{O}_4}{\to }}C{O}_2+2H_{2}O$ (ii)
The above reaction is complete oxidation or combustion of alkanes.
(B) $2C{H}_4+O_2\underset{100atm}{\overset{Cu/523K}{\to }}2C{H}_{3}OH$ (iii)
When a mixture of methane and oxygen is passed through copper tubes at $523K$ and $100atm$, Methyl alcohol is produced.
It is an example of controlled oxidation.
(C) $C{H}_4+O_2\underset{\Delta }{\overset{M{O}_2{O}_3}{\to }}HCHO+H_{2}O$ (iv)
Products formed in the above reaction are $HCHO$ and $H_{2}O$ i.e, formaldehyde and water.
It is also an example of controlled oxidation.
(D) $C{H}_4+\frac{3}{2}{O}_2\stackrel{{\left(C{H}_{3}COO\right)}_{2}Mn}{\to }HCOOH+H_{2}O$