JEE CHEMISTRY MCQ: REDOX REACTIONS

1 Medium

1 of 1

Analyzing +4 | -1

How many of the following species / reagent can reduce

\mathrm{Fe}^{+3}(a q)

in to

\mathrm{Fe}^{+2}(a q)

at normal conditions

\left(\mathrm{NH}_4\right)_2 \mathrm{~S}, \mathrm{HI}, \mathrm{Sn}^{+2}(a q), \mathrm{CN}^{-}(a q), \mathrm{NaNO}_2, \mathrm{SO}_2, \mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3, \mathrm{SCN}^{-}(a q)

, acidified

\mathrm{NaIO}_3

View answer and explanation

Correct option: A

Option A (5) is correct because the following species can reduce

\mathrm{Fe}^{+3}(aq)

\mathrm{Fe}^{+2}(aq)

(\mathrm{NH}_4)_2 \mathrm{~S}, \mathrm{HI}, \mathrm{Sn}^{+2}(aq), \mathrm{SO}_2, \mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3

More Questions from REDOX REACTIONS

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\mathrm{H}

2 \mathrm{KClO}_3 \longrightarrow 2 \mathrm{KCl}+3 \mathrm{O}_2

\mathrm{HNO}_3

\mathrm{HNO}_3

\mathrm{MnO}_4^{-}(\mathrm{aq})+\mathrm{Br}^{-}(\mathrm{aq})+\mathrm{H}_2 \mathrm{O} \longrightarrow 2 \mathrm{MnO}_2(\mathrm{aq})+\mathrm{BrO}_3^{-}(\mathrm{aq})+2 \mathrm{OH}^{-}(\mathrm{aq})

\mathrm{Br}

-1

+5.