Question

Sulphuric acid $\left(H_{2}S{O}_4\right)$ can be prepared by which of the following method(s)?

• A. Contact Process
• B. Lead Chamber Process
• C. Both (a) and (b)
• D. Neither (a) nor (b)

Answer 1

The correct option is C Both (a) and (b)

Sulphuric acid can be prepared by both the methods:

1. Lead Chamber Process:

$2S{O}_2\left(g\right)+O_2\left(g\right)\to 2S{O}_3\left(g\right)$
$S{O}_3\left(g\right)+H_{2}O\left(l\right)\to H_{2}S{O}_4\left(aq\right)$

Catalyst used is Nitric Oxide $\left(NO\right)$

2. Contact Process
$2S{O}_2\left(g\right)+O_2\left(g\right)\to 2S{O}_3\left(g\right)$
$S{O}_3\left(g\right)+H_{2}S{O}_4\left(aq\right)\to H_2{S}_2{O}_7\left(l\right)$
$H_2{S}_2{O}_7\left(l\right)+H_{2}O\left(l\right)\to 2H_{2}S{O}_4\left(aq\right)$

Catalyst used is Platinised asbestos or vanadium pentoxide $\left(V_2{O}_5\right)$