Chemistry·MCQ Practice

Redox Reactions — MCQ Practice

NEET UG

Version 1Updated 22 Mar 2026

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Test your knowledge. Click “Solve” to reveal options, select your answer, then check the result. 6 questions available.

Q1easy

In the reaction $MnO_2 + 4HCl \rightarrow MnCl_2 + Cl_2 + 2H_2O$ , which species is oxidized?

Q2easy

What is the oxidation state of chromium in $K_2Cr_2O_7$ ?

Q3medium

Which of the following reactions is an example of a disproportionation reaction?

Q4hard

In the balanced redox reaction in acidic medium: $Cr_2O_7^{2-} + XFe^{2+} + YH^+ \rightarrow 2Cr^{3+} + XFe^{3+} + ZH_2O$ , what are the values of X, Y, and Z?

Q5easy

Which of the following elements always exhibits a +1 oxidation state in its compounds?

Q6medium

In the reaction $P_4 + 3NaOH + 3H_2O \rightarrow PH_3 + 3NaH_2PO_2$ , what is the change in oxidation state of phosphorus?