Jamb Chemistry Past Questions and Answers

Question 2046:

• 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 2047:

• 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

Question 2048:

• JAMB 2019

A second alkanol can be oxidized to give an

A. Alkanone
B. Alkyne
C. Alkanoic acid
D. Alkanal

Question 2049:

• JAMB 2019

A second alkanol can be oxidized to give an

A. Alkanone
B. Alkyne
C. Alkanoic acid
D. Alkanal

Question 2050:

• JAMB 2019

Which of the following will give a precipitate with an aqueous solution of copper (I) chloride?

A. But-2-ene
B. But-1-ene
C. But-2-yne
D. But-1-yne