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 $Cr$ in $K_2 Cr_2 O_7$. $\therefore(2 \times 1)+(2 \times x)+7(-2)=0$ or $2+2 x-14=0$ or $x=+6$.

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Redox Reactions - Result Question 10

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