Jamb Chemistry 2021 Past Questions and Answers

Question 11:

• JAMB 2021

The metal used to recover copper from a solution of copper sulphate is?

A. Na
B. Ag
C. Hg
D. Fe

Question 12:

• JAMB 2021

The nucleus of an atom consists of?

A. Electrons and neutrons
B. Electrons and protons
C. Protons and neutrons
D. None of the above

Question 13:

• JAMB 2021

A solution contains 20g of solute in 180g of solvent. If the solvent is water, what is the concentration of the solution in terms of mass by mass percentage

A. 11.%
B. 22.2%
C. 10%
D. 20%

Question 14:

• JAMB 2021

The only metal that is anti-bacterial is?

A. Iron
B. Sodium
C. Alluminium
D. Copper

Question 15:

• JAMB 2021

An element having the atomic number 17 will resemble which of the following elements having atomic number as given below?

A. 33
B. 35
C. 18
D. 19