(a) Write balanced equations:

(i) when butane is burnt in oxygen

(ii) for preparation of ethylene from ethyl alcohol.

(b) (i) Convert ethane to acetic acid

(ii) Convert ethyne to ethane.

(i) C₄H₁₀ + 6O₂ ⟶ 4CO₂ + 5H₂O

(ii)

$\underset{\text{ ethyl alcohol}}{\text{C}$2\text{H}5\text{OH}} \xrightarrow[170\degree\text{C}]{\text{Conc. H}2\text{SO}4\text{[excess]}} \underset{ \text{ethylene}}{\text{C}2\text{H}4} + \text{H}_2\text{O}\

(b) (i)

$\underset{\text{ ethane}}{2\text{C}$2\text{H}6} + \text{O}2 \xrightarrow[120 \text{ atm.}]{\text{Cu tube 475 K}} \underset{\text{ethyl alcohol}}{2\text{C}2\text{H}_5\text{OH}}

$\underset{\text{ethyl alcohol}}{\text{C}$2\text{H}5\text{OH}} + \text{O}2 \xrightarrow{\text{Pt. 300}\degree\text{C}} \underset{\text{acetic acid}}{\text{CH}3\text{COOH} + \text{H}_2\text{O}}

(ii)

$\underset{\text{ Ethyne}}{\text{C}$2\text{H}2} + \text{H}2 \xrightarrow{\text{Nickle}} \underset{\text{ethene}}{\text{C}2\text{H}4} + \text{H}2 \xrightarrow{\text{Nickle}} \underset{\text{ethane}}{\text{C}2\text{H}6}