NEET UG CHEMISTRY MCQ: REDOX REACTIONS

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Analyzing +4 | -1

Statement-I: O.N. of carbon in

\mathrm{H}-\mathrm{C} \equiv \mathrm{N}

is +4.

Statement-II: Carbon always shows an O.N. of +4.

View answer and explanation

Correct option: B

Both the statements are incorrect

Both statements are incorrect. The oxidation number of carbon in HCN is -1, and carbon can exhibit various oxidation states, not always +4.

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{I_2}

\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}

\mathrm{MnO}_4^ -

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

{\mathrm{H}^ + }