Question

In the following redox reaction,
$xUO ^{2+}+ Cr _{2} O _{7}^{2-}+ yH ^{+} \rightarrow xUO _{2}^{2-}+ zCr ^{3+}+6 H _{2} O$
the value of coefficients $x, y$ and $z$ respectively are:

• A. 3,8,2
• B. 3,8,7
• C. 3,2,4
• D. 3,1,8

Answer 1

Answer: (A)

The balance chemical reaction is as

$3 UO ^{2+}+ CrO _{7}^{2-}+8 H ^{+} \rightarrow 3 UO _{2}^{2+}+2 Cr ^{3+}+4 H _{2} O$