Jamb Chemistry 1992 Past Questions and Answers

Question 31:

• JAMB 1992

Which of the following oxides of nitrogen is unstable in air?

A. NO₂
B. NO
C. N₂O₄
D. N₂O_5-

Question 32:

• JAMB 1992

The gas formed when ammonium trioxonitrate (V) is heated with sodium hydroxide is?

A. Hydrogen
B. Nitrogen (IV) oxide
C. Oxygen
D. Ammonium

Question 33:

• JAMB 1992

The gas formed when ammonium trioxonitrate (V) is heated with sodium hydroxide is?

A. Hydrogen
B. Nitrogen (IV) oxide
C. Oxygen
D. Ammonium

Question 34:

• JAMB 1992

Safety matches contain sulphur and?

A. Potassium trioxochlorate (V)
B. Potassium trioxonitrate (V)
C. Charcoal
D. Phosphorus sulphide

Question 35:

• JAMB 1992

Addition of an aqueous solution of a salt gives a white precipitate. The salt is likely to be a?

A. Nitrate
B. Carbonate
C. Chloride
D. Sulphide