BOD stands for: MCQ with Answer and Explanation

Explanation:
The Solvay process (or ammonia-soda process) is the major industrial process for the production of sodium carbonate (soda ash, Na2CO3). It uses brine (NaCl) and limestone (CaCO3) as raw materials, with ammonia acting as an intermediate that is recovered and recycled.

Explanation:
Froth flotation separates sulfide ore particles from gangue by using oil and water. The ore particles adhere to the froth and float, while gangue sinks. Used for ZnS, PbS, CuFeS₂. Magnetic separation for magnetite, leaching for bauxite.

Explanation:
Combined gas law: P₁V₁/T₁ = P₂V₂/T₂. Given P₂ = 2P₁, T₂ = 2T₁. So V₂ = V₁ × (P₁/P₂) × (T₂/T₁) = 22.4 × (1/2) × (2/1) = 22.4 L. Pressure increase tries to halve volume, temperature increase tries to double volume; they cancel out. So volume remains unchanged. This assumes ideal behavior.