Welcome to the **Oxidation Number Or State MDCAT** MCQs with Answers. In this post, we have shared **Oxidation Number Or State** Multiple Choice Questions and Answers for **PMC MDCAT 2024**. Each question in MDCAT Chemistry offers a chance to enhance your knowledge regarding **Oxidation Number Or State** MCQs in this MDCAT Online Test.

The oxidation number of oxygen in most of its compounds is:

a) +2

b) +1

c) -1

d) -2

The oxidation number of hydrogen in most of its compounds is:

a) +1

b) -1

c) 0

d) +2

In a neutral molecule, the sum of oxidation numbers of all atoms is:

a) +1

b) -1

c) 0

d) 1

In a polyatomic ion, the sum of oxidation numbers of all atoms equals:

a) The ion’s charge

b) 0

c) +1

d) -1

The oxidation number of chlorine in NaCl is:

a) +1

b) -1

c) 0

d) +2

The oxidation state of sulfur in H₂SO₄ is:

a) +4

b) +6

c) -2

d) 0

The oxidation number of nitrogen in NH₃ is:

a) +3

b) -3

c) 0

d) +5

In the compound H₂O₂, the oxidation number of oxygen is:

a) -2

b) -1

c) 0

d) +1

The oxidation state of potassium in K₂O is:

a) +1

b) +2

c) -1

d) -2

In the compound KClO₃, the oxidation state of chlorine is:

a) +1

b) +3

c) +5

d) +7

The oxidation number of carbon in CH₄ is:

a) +4

b) -4

c) 0

d) +2

The oxidation state of iodine in HI is:

a) +1

b) -1

c) 0

d) +2

In H₂SO₄, the oxidation state of hydrogen is:

a) +1

b) -1

c) 0

d) +2

The oxidation number of manganese in KMnO₄ is:

a) +2

b) +4

c) +6

d) +7

In the ion NO₃⁻, the oxidation state of nitrogen is:

a) +1

b) +3

c) +5

d) +7

The oxidation state of phosphorus in H₃PO₄ is:

a) +3

b) +5

c) +1

d) +7

The oxidation number of zinc in ZnSO₄ is:

a) +2

b) +1

c) -2

d) -1

In the compound Fe₂O₃, the oxidation state of iron is:

a) +2

b) +3

c) +4

d) +6

The oxidation number of chromium in K₂Cr₂O₇ is:

a) +2

b) +3

c) +6

d) +7

In the compound CO₂, the oxidation state of carbon is:

a) +2

b) +4

c) +1

d) 0

The oxidation state of barium in BaSO₄ is:

a) +2

b) +4

c) +6

d) +1

In the ion MnO₄⁻, the oxidation state of manganese is:

a) +2

b) +4

c) +6

d) +7

The oxidation number of sulfur in SO₂ is:

a) +2

b) +4

c) +6

d) +8

The oxidation state of calcium in CaCl₂ is:

a) +1

b) +2

c) +3

d) 0

In the compound HClO₄, the oxidation state of chlorine is:

a) +1

b) +3

c) +5

d) +7

The oxidation number of gold in AuCl₃ is:

a) +1

b) +2

c) +3

d) +4

In Na₂S, the oxidation state of sulfur is:

a) -2

b) +2

c) +4

d) +6

The oxidation state of aluminum in Al₂O₃ is:

a) +1

b) +2

c) +3

d) +6

The oxidation number of nitrogen in NO₂ is:

a) +2

b) +3

c) +4

d) +5

The oxidation state of copper in CuSO₄ is:

a) +1

b) +2

c) +3

d) +4

The oxidation number of chlorine in Cl₂ is:

a) +1

b) +2

c) +3

d) 0

In H₂S, the oxidation state of sulfur is:

a) -2

b) +2

c) +4

d) +6

The oxidation state of iodine in ICl is:

a) -1

b) +1

c) +2

d) +3

In the ion CrO₄²⁻, the oxidation state of chromium is:

a) +2

b) +3

c) +4

d) +6

The oxidation state of manganese in MnSO₄ is:

a) +2

b) +3

c) +4

d) +7

The oxidation number of carbon in CO is:

a) +1

b) +2

c) 0

d) -1

In NaNO₃, the oxidation state of nitrogen is:

a) +1

b) +2

c) +3

d) +5

The oxidation state of tungsten in WO₃ is:

a) +2

b) +4

c) +6

d) +8

In the ion SO₃²⁻, the oxidation state of sulfur is:

a) +2

b) +4

c) +6

d) +8

The oxidation state of zinc in ZnCl₂ is:

a) +1

b) +2

c) +3

d) 0

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