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

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

JEE AdvancedJEE Advanced 2018The p-Block Elements - Part2

Solution:

(A) $Bi_2O_5$ is metallic oxide but $N_2O_5$ is non metallic oxide therefore $Bi_2O_5$ is basic but $N_2O_5$ is acidic.
(B) In $NF_3$ , N and F are non metals but $BiF_3$ , Bi is metal but F is non metal therefore $NF_3$ is more covalent than $BiF_3$.
(C) In $PH_3$ hydrogen bonding is absent but in $NH_3$ hydrogen bonding is present therefore $PH_3$ boils at lower temperature than $NH_3$.
(D) Due to small size in N-N single bond l.p. - l.p. repulsion is more than P-P single bond therefore N-N single bond is weaker than the P-P single bond.