JEE Main 2018 — Coordination Compounds Question with Solution
From: JEE Main 2018 (Offline)
Question
Consider the following reaction and statements:
[Co(NH3)4Br2]+ + Br- [Co(NH3)3Br3] + 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
[Co(NH3)4Br2]+ + Br- [Co(NH3)3Br3] + 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
When reactant is cis isomer then following reaction takes place.
So, if reactant is cis - isomer then two isomers are produced.
When reactant is trans isomer then following reaction takes place.
So, if the reactant is trans isomer then only one isomer is produced.
So, if reactant is cis - isomer then two isomers are produced.
When reactant is trans isomer then following reaction takes place.
So, if the reactant is trans isomer then only one isomer is produced.
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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.