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

Pick the correct trends

Options

  1. ANF ₃ NCl ₃ NBr ₃ NI ₃ (Increasing Lewis base strength)
  2. BNF ₃ NCl ₃ NBr ₃ (Increasing stability)
  3. CNCl ₃ PCl ₃ AsCl ₃ SbCl ₃ BiCl ₃ (Decreasing ease of hydrolysis)
  4. DAs ₂ O ₃ P ₂ O ₃ N ₂ O ₃ (Decreasing acid strength)

Correct answer

C. NCl ₃ PCl ₃ AsCl ₃ SbCl ₃ BiCl ₃ (Decreasing ease of hydrolysis)

Step-by-step solution

Basic strength of nitrogen trihalides is inversely proportional to electronegativity of halogen. Stability of nitrogen trihalides is directly proportional to electronegativity difference between N -atom and halogen atom. Ease of hydrolysis of trichlorides of group-15 decreases down the group due to increase in metallic character of group-15 elements. Acidic strength of oxides of group-15 decreases down the group due to decrease in electronegativity.

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