Of the following sets which one does NOT contain isoelectronic species? - Chemistry MCQ AIEEE 2026 | ExamTest.live | ExamTest.live

Home Tests Search Rank Profile

mediumMCQAIEEE2026Chemistry

2 attempts0% success rate1 mark

Of the following sets which one does NOT contain isoelectronic species?

A $PO_{4}^{3 -}, SO_{4}^{2 -}, ClO_{4}^{-}$
B $CN^{-}, N_{2}, C_{2}^{2 -}$
C $SO_{3}^{2 -}, CO_{3}^{2 -}, NO_{3}^{-}$
D $BO_{3}^{3 -}, CO_{3}^{2 -}, NO_{3}^{-}$

Solution & Step-by-step Explanation

Isoelectronic species have the same total number of electrons.In Option C: CO_{3}^{2 -} : 6 + 3 (8) + 2 = 32 electrons. NO_{3}^{-} : 7 + 3 (8) + 1 = 32 electrons. SO_{3}^{2 -} : 16 + 3 (8) + 2 = 42 electrons. SO_{3}^{2 -} has 42 electrons while the others have 32, so they are not isoelectronic.

Practice this question

Try it yourself before checking the explanation above.

Of the following sets which one does NOT contain isoelectronic species?

A

PO_{4}^{3 -}, SO_{4}^{2 -}, ClO_{4}^{-}

B

CN^{-}, N_{2}, C_{2}^{2 -}

C

SO_{3}^{2 -}, CO_{3}^{2 -}, NO_{3}^{-}

D

BO_{3}^{3 -}, CO_{3}^{2 -}, NO_{3}^{-}

Share This Question

Atomic Structure Isoelectronic Species

Related Questions

Which one of the following statements is true?

Which of the following statements is not correct?

Which one of the following statements is correct?

The product formed by the reaction of an aldehyde with a primary amine is:

Which part of the tobacco plant is infected by Meloidogyne incognita?

The term ecosystem was coined by:

Ready for a Full Test?

Practice with timed mock tests and track your performance across Chemistry.

Browse Tests Leaderboard

Discussion