Question

Write balanced equation for the following:
Ethane is burnt in air.
(a) Write the equation for the preparation of ethylene from ethyl alcohol.
(b) Write the general formula for a saturated hydrocarbon and give one example of a saturated hydrocarbon with its structural formula.
(c) Name a compound which will give acetylene gas, when treated with water.

Answer 1

(a) ${\mathrm{C}}_2{\mathrm{H}}_6+7{\mathrm{O}}_2\to 4{\mathrm{CO}}_2+6{\mathrm{H}}_2\mathrm{O}+\mathrm{Heat}$

(b) $\underset{\mathrm{Ethyl}\mathrm{alcohol}}{{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}}\underset{170°\mathrm{C}}{\overset{\mathrm{Conc}.{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }}\underset{\mathrm{Ethylene}}{{\mathrm{CH}}_2={\mathrm{CH}}_2}+{\mathrm{H}}_2\mathrm{O}$

(c) The general formula of a saturated hydrocarbon is C_nH_​2n+2.
An example of a saturated hydrocarbon is propane (C₃H₈).
Its structural formula is:


(d) The compound that yields acetylene gas on treatment with water is calcium carbide.