Question

Identify \(X\) and \(Y\) involved in the extraction of zinc from sphalerite in the sequence given below \[ \text{Sphalerite} \longrightarrow \text{Froth flotation} \longrightarrow X \longrightarrow \text{Reduction with coke} \longrightarrow Y \longrightarrow \text{Pure zinc} \]

• A. \(X\)- Calcination; \(Y\)- Electrolysis
• B. \(X\)- Roasting; \(Y\)- Fractional distillation
• C. \(X\)- Roasting; \(Y\)- Liquation
• D. \(X\)- Calcination; \(Y\)- Fractional distillation \bigskip

Hint:

Extraction of zinc from sphalerite: \[ \boxed{\text{Froth flotation}\rightarrow \text{Roasting}\rightarrow \text{Reduction with coke}\rightarrow \text{Fractional distillation}} \] Sulphide ores are generally roasted before reduction.

Answer 1

The Correct Option is B

Step 1: ZnS concentrated by froth flotation. Roasting converts ZnS to ZnO (X = Roasting). ZnO reduced by coke to Zn, purified by fractional distillation (Y = Fractional distillation).

Step 2: Write the final answer. \(\boxed{X=\text{Roasting},\qquad Y=\text{Fractional distillation}}\)