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)	$C{H}_4+2O_2\underset{\left[O\right]}{\overset{KMn{O}_4}{\to }}$	(i)	$HCOOH+H_{2}O$
(B)	$2C{H}_4+O_2\underset{100atm}{\overset{Cu/523K}{\to }}$	(ii)	$C{O}_2+2H_{2}O$
(C)	$C{H}_4+O_2\underset{\Delta }{\overset{M{o}_2{O}_3}{\to }}$	(iii)	$2C{H}_{3}OH$
(D)	$C{H}_4+\frac{3}{2}{O}_2\underset{}{\overset{(C{H}_{3}COO{)}_{2}Mn}{\to }}$	(iv)	$HCHO+H_{2}O$

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

Answer 1

The correct option is B $\left(A\right)\to \left(ii\right),\left(B\right)\to \left(iii\right),\left(C\right)\to \left(iv\right),\left(D\right)\to \left(i\right)$

(A) $C{H}_4+2O_2\underset{\left[O\right]}{\overset{KMn{O}_4}{\to }}C{O}_2+2H_{2}O$ (ii)

The above reaction is complete oxidation or combustion of alkanes.

(B) $2C{H}_4+O_2\underset{\text{100 atm}}{\overset{Cu/523K}{\to }}2C{H}_{3}OH$ (iii)

When a mixture of methane and oxygen is passed through copper tubes at 523K and 100 atm, Methyl alcohol is produced.

It is an example of controlled oxidation.

(C) $C{H}_4+O_2\underset{\Delta }{\overset{{Mo}_2{O}_3}{\to }}HCHO+H_{2}O$ (iv)

Products formed in the above reaction are $HCHOand{H}_{2}O$ i.e, formaldehyde and water.

It is also an example of controlled oxidation.

(D) $C{H}_4+\frac{3}{2}{O}_2\stackrel{{\left(C{H}_{3}COO\right)}_{2}Mn}{\to }HCOOH+H_{2}O$ (i)