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Test: Oxidation State of central metal ions - Chemistry MCQ


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10 Questions MCQ Test Inorganic Chemistry - Test: Oxidation State of central metal ions

Test: Oxidation State of central metal ions for Chemistry 2024 is part of Inorganic Chemistry preparation. The Test: Oxidation State of central metal ions questions and answers have been prepared according to the Chemistry exam syllabus.The Test: Oxidation State of central metal ions MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Oxidation State of central metal ions below.
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Test: Oxidation State of central metal ions - Question 1

What is the oxidation state of vanadium in [V (H2O)6] 3+

Detailed Solution for Test: Oxidation State of central metal ions - 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

What is the oxidation state of iron in [Fe(H2O)6] 2+

Detailed Solution for Test: Oxidation State of central metal ions - 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

The oxidation number of an element tells us about the

Detailed Solution for Test: Oxidation State of central metal ions - Question 3

All of the these

Explanation: The oxidation number of an element provides important information:

  • It tells us the charge on the central metal atom in coordination compounds.
  • It indicates the number of electrons gained, lost, or shared during a chemical reaction.
  • It reflects the degree of oxidation of an element in a compound or ion.
Test: Oxidation State of central metal ions - Question 4

In which of the following compound will chlorine show the highest oxidation state?

Detailed Solution for Test: Oxidation State of central metal ions - 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

What is the oxidation state of iron in Fe(CO)5?

Detailed Solution for Test: Oxidation State of central metal ions - 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

What is the oxidation state of cobalt in [CoCl6]2-

Detailed Solution for Test: Oxidation State of central metal ions - 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

What is the oxidation state of platinum in [PtCl6]2-

Detailed Solution for Test: Oxidation State of central metal ions - 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

The oxidation state of an element tells us about the

Detailed Solution for Test: Oxidation State of central metal ions - 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

What is the oxidation state of oxygen in the ozone?

Detailed Solution for Test: Oxidation State of central metal ions - 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

What is the oxidation state of chromium in K2CrO4?

Detailed Solution for Test: Oxidation State of central metal ions - 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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