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JEE Main levelSingle correct optionDifficulty 2 of 3pn044

The basicities of , , and are, respectively,

  1. A1, 2, 3 and 4
  2. B3, 3, 3 and 4
  3. C1, 3, 3 and 4
  4. D2, 2, 3 and 4

Answer: A

Basicity equals the number of ionisable P-OH groups; P-H hydrogens are not acidic. has 1 P-OH (and 2 P-H), has 2 P-OH (and 1 P-H), has 3 P-OH, and has 4 P-OH.
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