JEE Main 2024 — Chemistry Physical Chemistry

2024mcqeasy

Reduction potential of ions are given below:

${\mathrm{ClO}}_{4}^{-}{\mathrm{IO}}_{4}^{-}{\mathrm{BrO}}_{4}^{-}$

$E^{\circ}=1.19V;E^{\circ}=1.65V;E^{\circ}=1.74V$

The correct order of their oxidising power is:

Official previous-year question

Held on 30 Jan 2024 · Verified 6 Jul 2026.

Options

A
${\mathrm{ClO}}_{4}^{-}>{\mathrm{IO}}_{4}^{-}>{\mathrm{BrO}}_{4}^{-}$
B
${\mathrm{BrO}}_{4}^{-}>{\mathrm{IO}}_{4}^{-}>{\mathrm{ClO}}_{4}^{-}$
C
${\mathrm{BrO}}_{4}^{-}>{\mathrm{ClO}}_{4}^{-}>{\mathrm{IO}}_{4}^{-}$
D
${\mathrm{IO}}_{4}^{-}>{\mathrm{BrO}}_{4}^{-}>{\mathrm{ClO}}_{4}^{-}$

Did you get this right?

Solution

The reduction potential of the substance is the ability of the substance to be reduced. So as the reduction potential increases, the reducing ability of the substance increases. It means the oxidising power of the substance (The ability of the substance to make the other substance to lose the electrons increases, which nothing but oxidising power) increases.

So the decreasing order of oxidising power is ${\mathrm{BrO}}_{4}^{-}>{\mathrm{IO}}_{4}^{-}>{\mathrm{ClO}}_{4}^{-}$ .

Hence option B is correct.

Your note

JEE Main Physical Chemistry in other years

Physical Chemistry 2026 Physical Chemistry 2025 Physical Chemistry 2023 Physical Chemistry 2022 Physical Chemistry 2021 Physical Chemistry 2020 Physical Chemistry 2019 Physical Chemistry 2018 Physical Chemistry 2017 Physical Chemistry 2016 Physical Chemistry 2015 Physical Chemistry 2014

Keep practicing Physical Chemistry

Work through every JEE Main Physical Chemistry PYQ, year by year.

Browse all Chemistry topics

Options

${\mathrm{ClO}}_{4}^{-}>{\mathrm{IO}}_{4}^{-}>{\mathrm{BrO}}_{4}^{-}$

${\mathrm{BrO}}_{4}^{-}>{\mathrm{IO}}_{4}^{-}>{\mathrm{ClO}}_{4}^{-}$

${\mathrm{BrO}}_{4}^{-}>{\mathrm{ClO}}_{4}^{-}>{\mathrm{IO}}_{4}^{-}$

${\mathrm{IO}}_{4}^{-}>{\mathrm{BrO}}_{4}^{-}>{\mathrm{ClO}}_{4}^{-}$

Solution

So the decreasing order of oxidising power is ${\mathrm{BrO}}_{4}^{-}>{\mathrm{IO}}_{4}^{-}>{\mathrm{ClO}}_{4}^{-}$ .

Hence option B is correct.

JEE Main 2024 — Chemistry Physical Chemistry

Options

Did you get this right?

Solution

Your note

JEE Main Physical Chemistry in other years

More JEE Main Physical Chemistry questions

Other Chemistry topics for JEE Main

Organic Chemistry

Inorganic Chemistry

Keep practicing Physical Chemistry

JEE Main 2024 — Chemistry Physical Chemistry

Options

Did you get this right?

Solution

Your note

JEE Main Physical Chemistry in other years

More JEE Main Physical Chemistry questions

Other Chemistry topics for JEE Main

Organic Chemistry

Inorganic Chemistry

Keep practicing Physical Chemistry