Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?

Options

A. `CH_(4)(g) + 2O_(2)(g) rarr CO_(2)(g)+2H_(2)O(l)`
B. `CH_(4)(g)+O_(2)(g)rarr C(s)+2H_(2)O(l)`
C. `CH_(4)(g)+O_(2)(g)overset(Mo_(2)O_(3))rarrHCHO+H_(2)O``2CH_(4)(g)+O_(2)(g)overset("Cu//523//100atm")rarr2CH_(3)OH`
D. `2CH_(4)(g)+O_(2)(g)overset("Cu//523//100atm")rarr2CH_(3)OH`

Answer

C, D

Explanation

Alkanes on heating with a regulated supply of dioxygen or air at high pressure and in the presence of suitable catalysts give a variety of oxidation products.
`2CH_(4)+O_(2)overset("Cu//523K//100atm")rarr2CH_(3)OH`
`CH_(4)+O_(2)overset(Mo_(2)O_(3))underset(Delta)rarrHCHO+H_(2)O`