Question

Which one of the following is a decomposition reaction?

a) 2H 2 (g) + O 2 (g) -> 2H 2O
b) (g) N 2 (g) + 3H 2 (g) -> 2NH 3
c) (g) CH 4 (g) + 2O 2 (g) -> CO 2 (g) + 2H 2O
d) (g) 2H 2O (l) -> 2H 2 (g) + O 2 (g)

Answer 1

Answer: Option (d) is the correct answer.

Step-by-step explanation:

When a reactant breaks into two or more number of products then the reaction is known as decomposition reaction.

Out of the given options, option (d) that is
`2H_(2)O(l)\rightarrow 2H_(2)(g) + O_(2)(g)`, is a decomposition reaction.

As here, the
`H_(2)O` molecule is breaking into hydrogen and oxygen. Hence, two products are obtained.

Thus, option (d) is the decomposition reaction.