Question

When sulphur (S) reacts with oxygen gas (O₂), it produces

• A. Basic Oxides
• B. Acidic Oxides
• C. Amphoteric Oxides
• D. A Salt

Answer 1

The correct option is B

Acidic Oxides

Non-metals on reaction with oxygen gas give rise to non-metallic oxides. These non-metallic oxides on reaction with $H_{2}O$ give acidic substances. Since sulphur is a non-metal. It forms $S{O}_2$ and $S{O}_3$ which on reaction with water form acids, $H_{2}S{O}_3$ and $H_{2}S{O}_4$ respectively.

S + $O_2$ → $S{O}_2$

$S{O}_2$ + $H_{2}O$ → $H_{2}S{O}_3$