Jamb Chemistry Past Questions and Answers

Question 1936:

• JAMB 2017

The reaction of halogens with alkanes in the presence of sunlight is an example of

A. Oxidation reaction
B. Addition reaction
C. Hydrogenation reaction
D. Substitution reaction

Question 1937:

• JAMB 2017

The enzyme used in the hydrolysis of starch to dextrin and maltose is

A. Amylase
B. Diastatse
C. Invertase
D. Zymase

Question 1938:

• JAMB 2017

The alkyl group is represented by the general formula

A. C_nH₂n
B. C_nH₂n − 2
C. C_nH₂n + 1
D. C_nH₂n + 2

Question 1939:

• 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 1940:

• JAMB 2017

In the diagram above. X is

A. SO₃
B. SO₂
C. S
D. H₂S