Jamb Chemistry 2018 Past Questions and Answers

Question 16:

• JAMB 2018

On which of the following is the solubility of a gaseous substance dependent?
I. Nature of solvent
II. Nature of solute
III. Temperature
IV. Pressure

A. I, II, III and IV
B. I and II only
C. II only
D. I, III and IV only

Question 17:

• JAMB 2018

Which of the following statements is correct about the periodic table?

A. Elements in the same period have the same number of valence electrons
B. The valence electrons of the elements in the same period increase progressively across the period
C. Elements in the same group have the same number of electron shells
D. The non-metallic Properties of the elements tend to decrease across each period

Question 18:

• JAMB 2018

The periodic classification is an arrangement of the elements

A. Atomic weights
B. Isotopic weights
C. Molecular weights
D. Atomic numbers

Question 19:

• JAMB 2018

If 1 litre of 2.2M sulphuric acid is poured into a bucket containing 10 litres of water and the resulting solution mixed thoroughly, the resulting sulphuric acid concentration will be

A. 2.2M
B. 1.1M
C. 0.22M
D. 0.11M

Question 20:

• JAMB 2018

In the shown experiment (Fig. 1) the litmus paper will initially

A. Be bleached
B. Turn green
C. Turn red
D. Turn blue