Chemistry·MCQ Practice

Oxidation Number — 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.

Q1hard

What is the oxidation number of sulfur in $H_2SO_5$ (Caro's acid)?

Q2medium

Which of the following compounds contains an element with a fractional oxidation number?

Q3easy

In which of the following compounds does hydrogen exhibit an oxidation number of -1?

Q4medium

Identify the oxidizing agent in the following reaction: $2KMnO_4 + 5H_2C_2O_4 + 3H_2SO_4 \rightarrow K_2SO_4 + 2MnSO_4 + 10CO_2 + 8H_2O$

Q5medium

What is the oxidation number of phosphorus in $H_3PO_2$ ?

Q6easy

Which of the following statements about oxidation number is INCORRECT?