JEE Main 2026 — d and f Block Elements Question with Solution
JEE Main 2026 (23 January Shift 2)
Question
The oxidation state of chromium in the final product formed in the reaction between KI and acidified solution is:
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
In the reaction between KI and acidified , Cr in the dichromate ion exists in +6 oxidation state. Iodide ions are oxidized to while chromium is reduced. The reduction product is ions, which form chromium(III) salts like or coordination complexes. Therefore, the oxidation state of chromium in the final product is +3.
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This is a previous-year question from JEE Main 2026, covering the d and f Block Elements 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.