Chemistry · Redox Reactions

JEE Main 2026 — 23 January, Evening Shift — Question 59

The oxidation state of chromium in the final product formed in the reaction between KI and acidified $\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}$ solution is:

Option A:
$+4$
Option B:
$+3$
Correct
Option C:
$+2$
Option D:
$+6$

Answer: B

Step-by-step solution

$\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}+\mathrm{KI} \xrightarrow{\mathrm{H}^{+}} \mathrm{I}_{2}+\mathrm{Cr}^{3+}$

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Exam: JEE Main 2026
Paper: 23 January, Evening Shift
Subject: Chemistry
Chapter: Redox Reactions
Topic: Types of Redox Reactions & Balancing of Redox Reactions

200 cc of x × 10^-3 M potassium dichromate is required to oxidise 750 cc of 0.6 M Mohr's salt solution in acidic medium. Here x=

Answer: B

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