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JEE Main levelSingle correct optionDifficulty 2 of 3sb180

Match the compound in List I with a use or property in List II. List I: (P) ; (Q) ; (R) ; (S) plaster of Paris. List II: (1) fused with sand and limestone for soda-lime glass; (2) saponification of fats; (3) sets to a rigid mass in fracture casts; (4) reacts vigorously with water to give slaked lime.

  1. AP-1, Q-2, R-3, S-4
  2. BP-2, Q-1, R-4, S-3
  3. CP-2, Q-1, R-3, S-4
  4. DP-4, Q-1, R-2, S-3

Answer: B

Soap is made by alkaline hydrolysis of fats with (P-2). Soda ash is a raw material of glass (Q-1). Quicklime slakes with water (R-4). Plaster of Paris sets as gypsum (S-3).
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