Question

Based on the compounds of group 15 elements , the correct statement(s) is (are)
(A) Bi₂O₅ is more basic than N₂O₅
(B) NF₃ is more covalent than BiF₃
(C) PH₃ boils at lower temperature than NH₃
(D) The N–N single bond is stronger than the P–P single bond

Answer 1

Answer: (A,B,C)
Solution:

(A) Bi₂O₅ is metallic oxide but N₂O₅ is non metallic oxide therefore Bi₂O₅ is basic but N₂O₅ is acidic.
(B)In NF₃ , N and F are non-metals but BiF₃ , Bi is metal but F is non-metal therefore NF₃ is more covalent than BiF₃.
(C) In PH₃ hydrogen bonding is absent but in NH₃ hydrogen bonding is present therefore PH₃ boils at lower temperature than NH₃.
(D) Due to small size in N–N single bond 1.p. – 1.p. repulsion is more than P–P single bond therefore N–N single bond is weaker than the P–P single bond.