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JEE Main levelSingle correct optionDifficulty 2 of 3mt069

Match List I with List II. List I: (1) Roasting (2) Calcination (3) Smelting with carbon (4) Aluminothermy. List II: (P) (Q) (R) (S) .

  1. A1-Q, 2-P, 3-S, 4-R
  2. B1-R, 2-P, 3-Q, 4-S
  3. C1-Q, 2-P, 3-R, 4-S
  4. D1-P, 2-Q, 3-R, 4-S

Answer: C

Roasting oxidises a sulphide in air (Q). Calcination decomposes a carbonate without air (P). Smelting reduces an oxide with carbon (R). Aluminothermy reduces an oxide with Al (S).
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