NEET UG CHEMISTRY MCQ: REDOX REACTIONS

1 Hard

1 of 1

Analyzing +4 | -1

A polyvalent metal weighing

0.1 \mathrm{gm}

and having atomic weight of 50 reacted with dilute

\mathrm{H}_2 \mathrm{SO}_4

to give

44.8 \mathrm{~mL}

of hydrogen at STP. The solution containing the metal in this Lower oxidation state, was found to require

60 \mathrm{~mL}

0.1 \mathrm{~N}

\mathrm{KMnO}_4

solution for complete oxidation. What are valencies of metal?

View answer and explanation

Correct option: C

+2,+5

Option C (+2, +5) is correct because the metal's valencies are determined by the amount of hydrogen released and the amount of KMnO₄ required for oxidation, leading to +2 and +5 oxidation states.

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