JEE Main 2018ChemistryCoordination CompoundsMediumMCQ

JEE Main 2018Coordination Compounds Question with Solution

JEE Main 2018 (08 Apr)

Question

Consider the following reaction and statements:

CoNH34Br2++Br-CoNH33Br3+NH3

(i) Two isomers are produced if the reactant complex ion is a cis-isomer.

(ii) Two isomers are produced if the reactant complex ion is a trans-isomer.

(iii) Only one isomer is produced if the reactant complex ion is a trans-isomer.

(iv) Only one isomer is produced if the reactant complex ion is a cis-isomer.

The correct statements are

Choose an option

Show full solutionCorrect option: C
Correct answer
C(i) and (iii)

Step-by-step explanation

From the below image it is clear that two isomers are produced if the reactant complexion is a cis-isomer, as well as only one isomer, is produced if the reactant complex is a trans-isomer.

Two isomers are produced if the reactant complex ion is a cis-isomer because the cis isomer can further form facial and meridional isomers.

Only one isomer is produced if the reactant complex ion is a trans-isomer because it cannot form any isomeric isomers.

Trans → only meridonial

Cis → fac and mer

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Coordination Compounds chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2018, covering the Coordination Compounds 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.