Question

Find the incorrect relation between the stoichiometric coefficients of the following balanced reaction.
$x{K}_{2}C{r}_2{O}_7+yHI\to zKI+\alpha Cr{I}_3+\beta H_{2}O+\gamma I_2$

• A. $y=z+\alpha +\beta +\gamma$
• B. $\beta =z+\alpha +\gamma$
• C. $\gamma =z+\alpha -x$
• D. $y=\beta -x$

Answer 1

The correct option is D $y=\beta -x$

The balanced chemical reaction is:
$K_{2}C{r}_2{O}_7+14HI\to 2KI+2Cr{I}_3+7H_{2}O+3I_2$
From here,
$x=1,y=14,z=2,\alpha =2,\beta =7,\gamma =3$
(a) $y=z+\alpha +\beta +\gamma$
$\Rightarrow 14=2+2+7+3$
(b) $\beta =z+\alpha +\gamma$
$\Rightarrow 7=2+2+3$
(c) $\gamma =z+\alpha -x$
$\Rightarrow 3=2+2-1$
(d) $y=\beta -x$
$\Rightarrow 14\ne 7-1$
Option (d) is the answer.