In the titration of ${\rm{CuS}}{{\rm{O}}_4}vs.$ . Hypo in presence of KI, which statement is wrong?

${{\rm{I}}_2}$ with starch gives blue colour

${\rm{CuS}}{{\rm{O}}_4}$ is reduced to white ${\rm{C}}{{\rm{u}}_2}{{\rm{I}}_2}$ during redox change

NEET UG CHEMISTRY MCQ: REDOX REACTIONS

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In the titration of

\mathrm{CuS}{\mathrm{O}_4}vs.

. Hypo in presence of KI, which statement is wrong?

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Correct option: D

The solution before titration, on addition of KI appears blue

Option D (The solution before titration, on addition of KI appears blue) is wrong because the solution turns blue only after the liberated iodine reacts with starch, not before.

More Questions from REDOX REACTIONS

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The oxidation state of iron in sodium nitroprusside is : Titrations in which liberated

{I_2}

is estimated to carry out the volumetric estimations are known as ….titrations. It is found that V forms a double salt isomorphous with Mohr’s salt. The oxidation number of V in this compound is : For redox reaction,

\mathrm{MnO}_4^ - + {\mathrm{C}_2}\mathrm{O}_4^{2 - } + {\mathrm{H}^ + } \to \mathrm{M}{\mathrm{n}^{2 + }} + \mathrm{C}{\mathrm{O}_2} + {\mathrm{H}_2}\mathrm{O}

coefficient of reactants in balanced states are

\mathrm{MnO}_4^ -

{\mathrm{C}_2}\mathrm{O}_4^{2 - }

{\mathrm{H}^ + }

Which one of the following reaction is possible at anode? The couple having oxidised and reduced forms of a substance taking part in an oxidation or reduction half-reaction is called