Practice question
Question
What is the oxidation state of chromium in the dichromate ion Cr₂O₇^{2- ?
Explanation
Given:
What is the oxidation state of chromium in the dichromate ion Cr₂O₇^{2- ?
Formula:
In Cr₂O₇^{2-, O = -2 (7 oxygens = -14).
Substitution & Calculation:
Let Cr = x. Then, 2x - 14 = -2, so 2x = 12, x = +6 .
Final Result:
The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.
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