Give balanced equations when:

(a) ethene is burnt in excess of oxygen.

(b) ethene reacts with chlorine gas.

(c) ethene combines with hydrogen chloride.

(d) a mixture of ethene and hydrogen is passed over nickel at 200°C.

Give the formula and names of A, B, C and D in the following equations:

(a)

$\text{CH}$4 \xrightarrow[\text{-HCl}]{\text{Cl}2} \text{A} \xrightarrow[\text{-HCl}]{\text{Cl}2} \text{B}\xrightarrow[\text{-HCl}]{\text{Cl}2} \text{C}\xrightarrow[\text{-HCl}]{\text{Cl}_2} \text{D}

(b)
$\text{C}$2\text{H}2 \xrightarrow{\text{H}2} \text{A} \xrightarrow{\text{H}2} \text{B}\xrightarrow[\text{-HBr}]{\text{Br}2} \text{C}\xrightarrow[\text{-HBr}]{\text{Br}2} \text{D}

(c)
$\text{C}$2\text{H}4 + \text{B} \xrightarrow[\text{Nickle}]{200\degree\text{C}} \text{C}2\text{H}6

What do you observe when ethene is passed through alkaline KMnO₄ solution?

Name three compounds formed by ethene and give one use of each compound.