Jamb Chemistry 2022 Past Questions and Answers

Question 16:

• JAMB 2022

GAS	CO\(_2\)	N\(_2\)	O\(_2\)
% BY VOLUME	4	72	24

The above table shows the compositions of the atmosphere of planet X. Which of these gases are present in higher percentages on earth?

A. CO\(_2\) and O\(_2\)
B. N\(_2\) and CO\(_2\)
C. CO\(_2\), O\(_2\) and N\(_2\)
D. O\(_2\) and N\(_2\)

Question 17:

• JAMB 2022

Hard water is water with high concentrations of dissolved ions, in particular calcium and

A. Magnesium ions
B. Nitrogen ions
C. Phosporus ions
D. Helium ions

Question 18:

• JAMB 2022

The sub-atomic particles located in the nucleus of an atom are?

A. Neutron and proton
B. Proton and electron
C. Proton and ions
D. Neutron and electron

Question 19:

• JAMB 2022

IUPAC nomenclature of the structure is?

A. 3-chloro-3-methylbutane
B. 2,2,-dichloro-3-methylbutane
C. 3-methylchlorobutane
D. 2-chloro-2-methylbutane

Question 20:

• JAMB 2022

\(_2\) + O\(_2\) → 2SO\(_3\)
In the reaction above, the most suitable catalyst is?

A. Chromium(vi)oxide
B. Iron(iii)oxide
C. Copper(i)oxide
D. Vanadium(v)oxide