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Chemistry Exam  >  Chemistry Test  >  Inorganic   >  Test: Oxidation State of central metal ions - Chemistry MCQ

Oxidation State of central metal ions - Free MCQ Practice Test with solutions,


MCQ Practice Test & Solutions: Test: Oxidation State of central metal ions (10 Questions)

You can prepare effectively for Chemistry Inorganic Chemistry with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Oxidation State of central metal ions". These 10 questions have been designed by the experts with the latest curriculum of Chemistry 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 12 minutes
  • - Number of Questions: 10

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Test: Oxidation State of central metal ions - Question 1
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What is the oxidation state of vanadium in [V (H2O)6] 3+

Detailed Solution: Question 1

x + 6 X 0 = + 3
x = + 3
Hence, the oxidation state of vanadium in [V (H2O)6] 3+ is + 3.
(The neutral molecule water has no overall oxidation state, and so vanadium's oxidation state is simply the charge on the ion.)

Test: Oxidation State of central metal ions - Question 2
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What is the oxidation state of iron in [Fe(H2O)6] 2+

Detailed Solution: Question 2

x + 6 X 0 = + 2
x = + 2
Hence, the oxidation state of iron in [Fe(H2O)6] 2+ is + 2.

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Test: Oxidation State of central metal ions - Question 3
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The oxidation number of an element tells us about the

Detailed Solution: Question 3

The oxidation number of an element indicates several important aspects:

  • It shows the number of electrons that the element has gained, lost, or shared during a reaction.
  • It reflects the degree of oxidation of the element in compounds.
  • It can also represent the charge on the central metal atom in coordination complexes.

Test: Oxidation State of central metal ions - Question 4
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In which of the following compound will chlorine show the highest oxidation state?

Detailed Solution: Question 4

To understand it better, first, we will calculate the oxidation state of HCl, HClO4, and KClO3.
The oxidation state of chlorine in HCl will be
1 + x = 0
x = – 1
The oxidation state of chlorine in HClO4 will be:
1 + x + 4 X ( -2) = 0
1 + x – 8 = 0
x – 7 = 0
x = + 7
The oxidation state of chlorine in KClO3 will be
1 + x + 3 X ( -2 ) = 0
1 + x – 6 = 0
x = + 5
Hence the oxidation state of chlorine is maximum in HClO4, i.e. equivalent to + 7.

Test: Oxidation State of central metal ions - Question 5
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What is the oxidation state of iron in Fe(CO)5?

Detailed Solution: Question 5

x + 5 X 0 = 0
x = 0
Hence, the oxidation state of iron in Fe(CO)5 is zero.

Test: Oxidation State of central metal ions - Question 6
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What is the oxidation state of cobalt in [CoCl6]2-

Detailed Solution: Question 6

x + 6 X – 1 = – 2
x – 6 = – 2
x = 6 – 2
x = + 4
Hence, the oxidation state of cobalt in [CoCl6]2- is + 4.

Test: Oxidation State of central metal ions - Question 7
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What is the oxidation state of platinum in [PtCl6]2-

Detailed Solution: Question 7

x + 6 X – 1 = – 2
x – 6 = – 2
x = 6 – 2
x = + 4
Hence, the oxidation state of platinum in [PtCl6]2- is + 4.

Test: Oxidation State of central metal ions - Question 8
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The oxidation state of an element tells us about the

Detailed Solution: Question 8

The oxidation state of an element tells us about the number of electrons gained, lost, or shared, i.e. degree of oxidation of an element.

Test: Oxidation State of central metal ions - Question 9
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What is the oxidation state of oxygen in the ozone?

Detailed Solution: Question 9

The ozone molecule comprises three oxygen atoms bonded together in elemental form. Since no electrons are transferred in the atom’s elemental form, thus, the oxidation state of oxygen in the ozone is equivalent to zero.

Test: Oxidation State of central metal ions - Question 10
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What is the oxidation state of chromium in K2CrO4?

Detailed Solution: Question 10

1 X 2 + x + 4 X (- 2) = 0
2 + x – 8 = 0
x – 6 = 0
x = + 6
Hence, the oxidation state of chromium in K2CrO4 is + 6.

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About this Chemistry Practice Test

This test contains 10 MCQs on Oxidation State of central metal ions with detailed solutions for each question. It is part of the Inorganic Chemistry course on EduRev, designed to align with the current Chemistry syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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