CBSE 2025 · Region 1 · Set 1 · Q18 · 2 marks
Complete and balance the following chemical equations :(a)$\displaystyle 2 \mathrm{MnO}_{4}^{-}(\mathrm{aq})+10 \mathrm{I}^{-}(\mathrm{aq})+16 \mathrm{H}^{+}(\mathrm{aq}) \longrightarrow$(b)$\displaystyle \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}(\mathrm{aq})+6 \mathrm{Fe}^{2+}(\mathrm{aq})+14 \mathrm{H}^{+}(\mathrm{aq}) \longrightarrow$
Complete and balance the following chemical equations :
(a)
$\displaystyle 2 \mathrm{MnO}_{4}^{-}(\mathrm{aq})+10 \mathrm{I}^{-}(\mathrm{aq})+16 \mathrm{H}^{+}(\mathrm{aq}) \longrightarrow$
(b)
$\displaystyle \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}(\mathrm{aq})+6 \mathrm{Fe}^{2+}(\mathrm{aq})+14 \mathrm{H}^{+}(\mathrm{aq}) \longrightarrow$
Marking-scheme solution
(a)
$\displaystyle 10\mathrm{I}^{-} + 2\mathrm{MnO}_{4}^{-} + 16\mathrm{H}^{+} \rightarrow 2\mathrm{Mn}^{2+} + 8\mathrm{H}_{2}\mathrm{O} + 5\mathrm{I}_{2}$
(b)
$\displaystyle \mathrm{Cr}_{2}\mathrm{O}_{7}^{2-} + 14\,\mathrm{H}^{+} + 6\,\mathrm{Fe}^{2+} \rightarrow 2\,\mathrm{Cr}^{3+} + 6\,\mathrm{Fe}^{3+} + 7\,\mathrm{H}_{2}\mathrm{O}$
The d-and f-Block ElementsSome Important Compounds of Transition ElementsApplyvery_short_answereasy
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