Jamb Chemistry 2021 Past Questions and Answers

Question 26:

• JAMB 2021

The gas which causes global warming is?

A. O\(_{2}\)
B. CO\(_{2}\)
C. N\(_{2}\)
D. He

Question 27:

• JAMB 2021

Oxygen is absent in?

A. Kerosene
B. Soil
C. Glass
D. Cement

Question 28:

• JAMB 2021

A sample of any of the following substances disappears after some time when exposed to the air like camphor, naphthalene, or dry ice.

This phenomenon is called?

A. Sublimation
B. Evaporation
C. Diffusion
D. Radiation

Question 29:

• JAMB 2021

The maximum electron in N shell is?

A. 2
B. 8
C. 18
D. 32

Question 30:

• JAMB 2021

Neutrons were discovered by?

A. James Chadwick
B. Ernest Rutherford
C. J.J Thompson
D. John Dalton