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Most Important Selected Qs for JEE AdvancedChemistryp Block Elements (Group 15, 16, 17 & 18)

Based on the compounds of group 15 elements, the correct statement(s) is (are)

Options

  1. ABi ₂ O ₅ is more basic than N ₂ O ₅
  2. BNF ₃ is more covalent than BiF ₃
  3. CPH ₃ boils at lower temperature than NH ₃
  4. DThe N-N single bond is stronger than the P - P single bond

Correct answer

C. PH ₃ boils at lower temperature than NH ₃

Step-by-step solution

Answer (A, B, C) Basic character of oxide decreases as we move down the group. Bi ₂ O ₅ is more basic than N ₂ O ₅ - Covalent nature depends on the electronegativity difference between bonded atoms. NF ₃ is more covalent than BiF ₃ - Boiling point of NH ₃ is more (due to H-bonding) than PH ₃ - P-P single bond is stronger than N-N single bond (as in N , due to smaller size of atoms lone pair-lone pair repulsion will be more)

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