Jamb Chemistry Past Questions For Year 2021
Question 26
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 27
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 28
The metal used to recover copper from a solution of copper sulphate is?
- A. Na
- B. Ag
- C. Hg
- D. Fe
Question 29
The nucleus of a hydrogen atom consist of a?
- A. 1 proton only
- B. 1 proton, 2 neutron
- C. 1 neutron only
- D. 1 electron only
Question 30
The process or act of extracting a metal from its ore and refining it is called?
- A. Extraction
- B. Metal mining
- C. Mettallurgy
- D. Prospecting
