Jamb Chemistry 2018 Past Questions and Answers

Question 86:

• JAMB 2018

When large hydrocarbon molecules are heated at high temperature in the presence of a catalyst to give smaller molecules, the process is known as

A. Disintegration
B. Polymerization
C. Cracking
D. Degradation

Question 87:

• JAMB 2018

In the removal of water hardness, permutit is regenerated with a strong solution of

A. NaOH
B. Na\(_3\)SO\(_4\)
C. Na\(_3\)CO\(_3\)
D. NaCl

Question 88:

• JAMB 2018

A sample of hard water contains some calcium sulphate and calcium hydrogen carbonate. The total hardness may therefore be removed by

A. Boiling the water
B. Adding excess calcium hydroxide
C. Adding a calculated amount of calcium hydroxide
D. Adding sodium carbonate

Question 89:

• JAMB 2018

Which of the following separation techniques can be employed in obtaining solvent from its solution?

A. Evaporation
B. Distillation
C. Filtration
D. Precipitation