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JEE Advanced levelSingle correct optionDifficulty 3 of 3pt024

Match the property (List I) with the diagonal pair (List II). List I: P. oxides amphoteric, carbide gives methane with water; Q. nitride formed directly with nitrogen, carbonate decomposes on heating; R. acidic oxides, volatile covalent hydrides, halides readily hydrolysed. List II: 1. Li-Mg; 2. Be-Al; 3. B-Si; 4. Na-Ca.

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

Answer: A

Be and Al both have amphoteric oxides and carbides (, ) that give methane (P-2). Li and Mg form nitrides directly and have decomposable carbonates (Q-1). B and Si have acidic oxides, covalent volatile hydrides and hydrolysable halides (R-3). Na-Ca is not a diagonal pair.
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