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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
- The percentage weight of Zn in white vitriol [ZnSO₄ 7H₂O] is approximately equal
- The equivalent weight of H₃PO₂, when it disproportionates into PH₃ and H₃PO₃ is
- The number of d-electrons in Fe²⁺(Z=26) is not equal to the number of electrons
- Polyamide
- Vapour pressure of dilute aqueous solution of glucose is 750 mm of mercury at
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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