Jamb Chemistry Past Questions and Answers

Question 256:

• JAMB 1982

An acid is said to be weak if?

A. Its ions are so completely dissociated that they easily drift apart
B. The acid is not corrosive
C. The acid has low specific gravity
D. Its ions move very slowly when in solution
E. Its ions are incompletely dissociated

Question 257:

• JAMB 1982

An acid is said to be weak if?

A. Its ions are so completely dissociated that they easily drift apart
B. The acid is not corrosive
C. The acid has low specific gravity
D. Its ions move very slowly when in solution
E. Its ions are incompletely dissociated

Question 258:

• JAMB 1982

Which of the following statements is correct during the electrolysis of a caustic soda solution using platinum electrodes?

A. Oxygen gas is given off at the cathode
B. Hydrogen gas is given of at the anode
C. Sodium metals is deposited at the anode
D. Sodium metal is deposited at the cathode
E. AAlkalinity at the cathode increases

Question 259:

• JAMB 1982

An amphoteric oxide is an?

A. Amorphous oxide of a metal
B. Amorphous oxide of a non-mental
C. Oxide that is insoluble in water
D. Oxide that behaves both as a base as well as an acid
E. Oxide that loses its oxygen on sublimation

Question 260:

• JAMB 1982

Water is poured over a white solid and a colourless neutral gas is evolved which burns with a sooty flame. The white solid is?

A. Calcium
B. Calcium oxide
C. Calcium carbide
D. Sodium peroxide
E. Sodium sulphate