Question

Select iso electronic set :-
(a) Na+, H3O+, NH4*
(b) C03-2, NO3-, HCO3
(c) P-3, HCI, C2H6, PH;
(d) N-3, 0-2, F
(1) a, b, d
(3) a, b, c, d
(2) b, c, d
(4) a, b, c​

Answer 1

The correct option is (4) a, b, c​)

Explanation for correct option:

Isoelectronic species

• All the atoms, ions or compounds that have the same number of valance electrons are termed isoelectronic species.

Since, Each of the

• a) Na+, H3O+, NH4+ have 10 electrons

• b) C03-2, NO3-, HCO3- have 32 electrons

• c) P-3, HCI, C2H6, PH3 have 18 electrons

Therefore, all of them are isoelectronic

Explanation for incorrect option:

• d) N-3, 0-2, F has 10, 10 and 9 electrons. Therefore, they are not isoelectronic.
• Because options 1, 2 and 3 have (d) in them. So, they are all incorrect.

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