Alkali metals - Jamb Chemistry Past Questions and Answers

Question 1:

• JAMB 2019

When sodium chloride and metallic sodium are each dissolved in water

A. Both processes are exothermic
B. Both processes are endothermic
C. The dissolution of metallic sodium is endothermic
D. The dissolution of metallic sodium is exothermic
E. The dissolution of sodium chloride is explosive

Question 2:

• JAMB 1978

When sodium chloride and metallic sodium are each dissolved in water

A. Both processes are exothermic
B. Both processes are endothermic
C. The dissolution of metallic sodium is endothermic
D. The dissolution of metallic sodium is exothermic
E. The dissolution of sodium chloride is explosive

Question 3:

• JAMB 1980

Which ONE of the following statements is true?

A. All alkali metals salts dissolves with dissociation in water
B. Most ionic substances are easily vaporized
C. Ionic substances exist only as liquid
D. Non-ionic substances are good electrolytes
E. Nitrogen exists in a trivalent state in ammonium salts

Question 4:

• JAMB 2011

Which of the following is NOT an alkali?

A. NH₃
B. Mg(OH)₂
C. Ca(OH)₂
D. NaOH

Question 5:

• JAMB 2016

Which of the following is not an alkali?

A. Ca(OH)₂
B. NH₃
C. NaOH
D. Al(OH)₃