Question

Which of the following reaction does not release any gas as product?

• A. Sulphuric acid with sodium carbonate
• B. Sodium sulphide with sulphuric acid
• C. Sulphuric acid with ferric oxide
• D. Sulphuric acid with sodium sulphite

Answer 1

The correct option is C

Sulphuric acid with ferric oxide

$\bullet$ Sulphuric acid reacts with sodium carbonate to give sodium sulphate, carbon dioxide and water.
<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $CaC{O}_3\left(s\right)+H_{2}S{O}_4\left(aq\right)\to CaS{O}_4\left(aq\right)+H_{2}O\left(l\right)+C{O}_2(\uparrow )$

$\bullet$ Sodium sulphide react with dilute sulphuric acid to form salt and hydrogen sulphide gas.
$N{a}_{2}S\left(s\right)+H_{2}S{O}_4\left(aq\right)\to N{a}_{2}S{O}_4\left(aq\right)+H_{2}S(\uparrow )$

$\bullet$Sulphuric acid reacts with sodium sulphite to give sodium sulphate salt, water and sulphur dioxide gas.
$N{a}_{2}S{O}_3\left(s\right)+H_{2}S{O}_4\left(aq\right)\to N{a}_{2}S{O}_4\left(aq\right)+H_{2}O\left(l\right)+S{O}_2(\uparrow )$

$\bullet$ Ferric oxide react with sulfuric acid to produce ferric sulfate and water.
$F{e}_2{O}_3\left(s\right)+3H_{2}S{O}_4\left(aq\right)⟶F{e}_2\left(S{O}_4{)}_3\right(aq)+3H_{2}O(l)$
No gaseous product is fromed in this reaction.
In the other cases, $C{O}_2,H_{2}S$ and $S{O}_2$ are released respectively.