SATHEE: Redox Reactions - Result Question 10

Redox Reactions - Result Question 10

####10. The oxidation number of chromium in potassium dichromate is

(a) +6

(b) -5

(d) +2

[1988, 1995]

Show Answer

Solution:

(a) Let $x =$ oxidation no. of $C r$ in $K_{2} C r_{2} O_{7}$ . $∴ (2 \times 1) + (2 \times x) + 7 (- 2) = 0$ or $2 + 2 x - 14 = 0$ or $x = + 6$ .

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Redox Reactions - Result Question 10

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