Oxidation and reduction - Jamb Chemistry Past Questions and Answers

Question 96:

• JAMB 2015

The oxidation state of oxygen on tetraoxosulphate iv acid is

A. -4
B. -2
C. 4
D. -8

Question 97:

• JAMB 2017

The oxidation number of iodine in KIO₃ is

A. +7
B. +3
C. +5
D. +6

Question 98:

• JAMB 2017

Cu2S(g) + O2(g) → 2Cu + SO2(g)
What is the change in the oxidation number of copper in the reaction?

A. 0 to + 2
B. 0 to + 1
C. C + 1 to 0
D. + 2 to + 1

Question 99:

• JAMB 2017

In the diagram above. X is

A. SO₃
B. SO₂
C. S
D. H₂S

Question 100:

• JAMB 2017

The diagram above. Y is

A. Fused CaO
B. H₂O
C. NaOH
D. Concentrated H₂SO₄