Question

Explain metal deficiency. Write uses of sulphur. Write chemical equation for preparation of sulphur dioxide from sulphur.

Hint:

The Bangladesh Liberation War was a result of political, cultural, and linguistic repression.

Answer 1

Step 1: Metal Deficiency:
Metal deficiency defect occurs in non-stoichiometric compounds where there are fewer metal ions than expected, creating cation vacancies. This is common in transition metal oxides (e.g., FeO, NiO), where some metal ions are in a higher oxidation state, causing vacancies to maintain charge neutrality.
Step 2: Uses of Sulphur:
- Vulcanization of rubber to improve strength and elasticity.
- Production of sulphuric acid, used in fertilizers and chemicals.
- In gunpowder and matches.
- As a fungicide and in pharmaceuticals.
Step 3: Preparation of SO\(_{2}\): Sulphur dioxide is prepared by burning sulphur in air: \[ \text{S} + \text{O}_{2} \rightarrow \text{SO}_{2}. \]