In acidic medium.... | JEE Main 2024 Solution

JEE-Main 2024

01.02.24_(S1)

Question

In acidic medium, $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ shows oxidising action as represented in the half reaction $\mathrm{Cr}_2 \mathrm{O}_7^{2-}+\mathrm{XH}^{+}+\mathrm{Ye}^{-} \rightarrow 2 \mathrm{~A}+\mathrm{ZH}_2 \mathrm{O}$ X,Y,Z and A are respectively are:

Select the correct option:

$ 8,6,4 \text { and } \mathrm{Cr}_2 \mathrm{O}_3 $

$ 14,7,6 \text { and } \mathrm{Cr}^{3+} $

$ \text { 8, 4, } 6 \text { and } \mathrm{Cr}_2 \mathrm{O}_3 $

$ 14,6,7 \text { and } \mathrm{Cr}^{3+} $

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

$$ \begin{aligned} &\text { The balanced reaction is, }\\ &\begin{aligned} & \mathrm{Cr}_2 \mathrm{O}_7^{2-}+14 \mathrm{H}^{+}+6 \mathrm{e}^{-} \rightarrow 2 \mathrm{Cr}^{3+}+7 \mathrm{H}_2 \mathrm{O} \\ & \mathrm{x}=14 \end{aligned} \end{aligned} $$ $$ \begin{aligned} & Y=6 \\ & A=7 \end{aligned} $$

Question Tags

JEE Main

Chemistry

Easy

Start Preparing for JEE with Competishun

Report Issue