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Oxidation number of chromium in Na₂Cr₂O₇ is
Options
(a) 2
(b) 4
(c) 3
(d) 6
Correct Answer:
6
Explanation:
Oxidation number of chromium in Na₂Cr₂O₇ is +6. Oxidation number of Na = +1. Oxidation number of O = -2. Therefore 2 + 2x -2 * 7 = 0.⇒ 2x – 12 = 0 , ⇒ x = +6.
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Topics: D and F Block Elements
(91)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- When 4g of iron is burnt to ferric oxide at constant pressure, 29.28 kJ of heat
- If 0.1 M of a weak acid is taken, and its percentage of degree of ionization
- Equivalent weight of KMnO₄ in basic medium is (mol.wt. of KMnO₄ = 158)
- Electromagnetic separation is used in the concentration of
- Which of the following halides is the most stable
Topics: D and F Block Elements (91)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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