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JEE Advanced levelSingle correct optionDifficulty 3 of 3el199

Match each type of cleansing agent in Column I with the statement in Column II that best describes it. Column I: P. Soap; Q. Anionic detergent; R. Cationic detergent; S. Non-ionic detergent. Column II: 1. Quaternary ammonium salt used as a germicide or in hair conditioners; 2. Ester of a fatty acid with polyethylene glycol, used in liquid dish-washing; 3. Forms insoluble calcium and magnesium salts with hard water; 4. Sodium alkyl sulphate or sulphonate, widely used in shampoos and laundry powders.

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

Answer: B

Soaps are carboxylates and give insoluble Ca and Mg salts (3). Anionic detergents are sodium alkyl sulphates or sulphonates in shampoos and powders (4). Cationic detergents are quaternary ammonium salts with germicidal use (1). Non-ionic detergents such as polyethylene glycol stearate are esters used in liquid dish-washing (2).
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