Among the following, the reaction/s that can be classified as oxidation- reduction is /are I. Cr_2 O_7 ^ 2- (aq)+2 OH^ - (aq) arrow 2 CrO_4 ^ 2- +H_2 O(l) II. SiCl_4(l)+2 Mg(s) arrow 2 MgCl_2(l)+Si(s) III. 6 Cl_2(l)+12

Correct answer: C. II, III and IV No Solution

Olympiad workbook

Olympiad workbook · NSEC · Redox Reactions

Among the following, the reaction/s that can be classified as...

Among the following, the reaction/s that can be classified as oxidation- reduction is /are I.

\quad \mathrm{Cr}_2 \mathrm{O}_7{ }^{2-}(\mathrm{aq})+2 \mathrm{OH}^{-}(\mathrm{aq}) \rightarrow 2 \mathrm{CrO}_4{ }^{2-}+\mathrm{H}_2 \mathrm{O}(\mathrm{l})

II.

\quad \mathrm{SiCl}_4(\mathrm{l})+2 \mathrm{Mg}(\mathrm{s}) \rightarrow 2 \mathrm{MgCl}_2(\mathrm{l})+\mathrm{Si}(\mathrm{s})

III.

\quad 6 \mathrm{Cl}_2(\mathrm{l})+12 \mathrm{KOH}(\mathrm{l}) \rightarrow 2 \mathrm{KClO}_3(\mathrm{~s})+10 \mathrm{KCl}+6 \mathrm{H}_2 \mathrm{O}(\mathrm{l})

IV.

\quad 2 \mathrm{H}_2 \mathrm{O}_2 \rightarrow 2 \mathrm{H}_2 \mathrm{O}(\mathrm{l})+\mathrm{O}_2(\mathrm{~g})

C. II, III and IV

No Solution