Name the compounds formed when methane burns in:

(a) sufficient air

(b) insufficient air

Give a balanced equation.

(a) The compounds formed are carbon dioxide and water

$\underset{\text{ methane} }{\text{CH}$4} + 2\text{O}2\text{[excess]} \longrightarrow \text{CO}2 + 2\text{H}2\text{O}

(b) The compounds formed are carbon monoxide and water

$\underset{\text{ methane} }{\text{2CH}$4} + 3\text{O}2\text{[insufficient]} \longrightarrow \text{2CO} + 4\text{H}_2\text{O}