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QJEEAdv18Ch9b92: JEE Advanced 2018 Chemistry - Class 12 JEEAdv18Ch9b92 Solution: Based on the compounds of group elements, the correct…

Based on the compounds of group 1515 elements, the correct statement(s) is (are)

Multiple Choice Options

  • A Bi2O5B{i_2}{O_5} is more basic than N2O5{N_2}{O_5}
  • B NF3N{F_3} is more covalent than BiF3Bi{F_3}
  • C PH3P{H_3} boils at lower temperature than NH3N{H_3}
  • D The N−NN-N single bond is stronger than the P−PP-P single bond

Step-by-Step Verified Solution

Option (A) : Correct. The basicity of oxides usually increases on descending a group. Therefore, Bi2O5 is more basic than N2O5.

Option (B) : Correct. Covalent nature of a molecule depends on the electronegativity difference between bonded atoms.

Option (C) : Correct. Boiling point of NH3 is more than that of PH3 due to hydrogen bonding.

Option (D) : Incorrect. P −- P single bond is stronger than N −- N single bond. This is due to the fact that N is small in size, due to smaller size of atoms lone pair of repulsion will be more.

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