JEE Main · 2023 · 11 Apr 2023 · Shift 2 · General Principles and Processes of Isolation of Metals

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Given below are two statements :

Statement-I : In the metallurgy process, sulphide ore is converted to oxide before reduction.

Statement-II : Oxide ores in general are easier to reduce.

In the light of the above statements, choose the most appropriate answer from the options given below:

(A)Both Statement I and Statement II are correct.✓ Correct
(B)Statement I is correct but Statement II is incorrect.
(C)Both Statement I and Statement II are incorrect.
(D)Statement I is incorrect but Statement II is correct.

Answer: (A)

Solution

Both statements are correct. In metallurgy, sulphide ores are typically roasted to convert them to oxides (e.g.,

2 ZnS + 3 O_{2} \to 2 ZnO + 2 SO_{2}

). Oxide ores are easier to reduce because carbon reduction of oxides produces

CO_{2}

, which is more volatile than

CS_{2}

(produced from sulphide reduction), making the process more favorable.

JEE Main · 2023 · 11 Apr 2023 · Shift 2 · Single correct option

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JEE Main · 2023 · 11 Apr 2023 · Shift 2 · General Principles and Processes of Isolation of Metals

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