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

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$B i_{2} O_{5}$ is more basic than $N_{2} O_{5}$

$N F_{3}$ is more covalent than $B i F_{3}$

$P H_{3}$ boils at lower temperature than $N H_{3}$

The N-N single bond is stronger than the P-P single bond

answer is A.

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Detailed Solution

A) $B i_{2} O_{5}$ is metallic oxide but $N_{2} O_{5}$ is non metallic oxide therefore $B i_{2} O_{5}$ is basic but $N_{2} O_{5}$ is acidic.

B) In $N F_{3}$ , N and F are non metals but $B i F_{3}$ , Bi is metal but F is non metal therefore $N F_{3}$ is more covalent than $B i F_{3}$ .

C) In $P H_{3}$ hydrogen bonding is absent but in $N H_{3}$ hydrogen bonding is present therefore $P H_{3}$ boils at lower temperature than $N H_{3}$ .

D)Due to small size in N–N single bond lone pair. – lone .pair. repulsion is more than P–P single bond therefore N–N single bond is weaker than the P–P single bond.

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