What are the products obtained by heating ethane in:
(a) excess of air
(b) absence of air
(c) air in presence of copper and 120 atm pressure.
(d) air with molybdenum oxide at 100 atm pressure.

The products obtained by heating ethane in:

(a) excess of air: We get carbon dioxide and water -
$2{\mathrm{C}}_2{\mathrm{H}}_6+\underset{\mathrm{excess}}{7{\mathrm{O}}_2}\to 4{\mathrm{CO}}_2+6{\mathrm{H}}_2\mathrm{O}+\mathrm{Heat}$

(b) absence of air: Ethene and hydrogen gas are obtained -
${\mathrm{CH}}_3-{\mathrm{CH}}_3\stackrel{\mathrm{Heat}}{\to }{\mathrm{H}}_2\mathrm{C}={\mathrm{CH}}_2+{\mathrm{H}}_2$

(c) air in presence of copper and 120 atm pressure: We get ethanol -
$2{\mathrm{C}}_2{\mathrm{H}}_6+{\mathrm{O}}_2\underset{120\mathrm{atm}}{\overset{\mathrm{Cu}}{\to }}2{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$

(d) air with molybdenum oxide at 100 atm pressure: Ethanal (acetaldehyde) is obtained -
${\mathrm{C}}_2{\mathrm{H}}_6+{\mathrm{O}}_2\underset{100\mathrm{atm}}{\overset{\mathrm{MoO}}{\to }}{\mathrm{CH}}_3\mathrm{CHO}+{\mathrm{H}}_2\mathrm{O}$