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JEE Main levelSingle correct optionDifficulty 2 of 3sb064

Match the diagonal pair in Column I with the property in Column II. Column I: (P) Li and Mg; (Q) Be and Al; (R) B and Si. Column II: (1) amphoteric oxides; (2) acidic oxides; (3) basic oxides; (4) oxides that are inert to water and acids.

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

Answer: A

Li2O and MgO are basic oxides (P-3). BeO and Al2O3 are amphoteric (Q-1). B2O3 and SiO2 are acidic (R-2). The matching is therefore P-3, Q-1, R-2.
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