JEE Main 2008 — Structure Of Atom Question with Solution
From: AIEEE 2008
Question
Which one of the following constitutes a group of the isoelectronic species?
Choose an option
Show full solutionCorrect option: B
Correct answer
B, , CN-,
Step-by-step explanation
| Species | No. of electrons |
|---|---|
| C22- | 12+2 = 14 |
| O2- | 16+1 = 17 |
| CO | 6+8 = 14 |
| NO | 7+8 = 15 |
| NO+ | 7+8-1 = 14 |
| C22- | 12+2 = 14 |
| CN- | 6+7+1 = 14 |
| N2 | 14 |
| CN- | 6+7+1 = 14 |
| N2 | 14 |
| O22- | 16+2 = 18 |
| C2 | 12 |
| N2 | 14 |
| O2- | 16+1 = 17 |
| NO+ | 7+8-1 = 14 |
| CO | 6+8 = 14 |
So, option is correct.
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This is a previous-year question from JEE Main 2008, covering the Structure Of Atom chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.