Jamb Chemistry Past Questions and Answers

Question 1716:

• JAMB 2013

In the laboratory preparation of ammonia, the flask is placed in a slanting position so as to

A. Prevent condensed water from breaking the reaction flask
B. Enable the proper mixing of the reactions in the flask
C. Enhance the speed of the reaction
D. Prevent formation of precipitate

Question 1717:

• JAMB 2013

Which of the gases is employed as an anaesthesia?

A. N ₂O
B. NO₂
C. NH₃
D. NO

Question 1718:

• JAMB 2013

Sulphur (IV)oxide is a strong reducing agent in the presence of water due to the formation of

A. Hydroxide ion
B. Sulpgur (Vl)oxide
C. Hydrogen sulhide
D. Trioxosulphate (IV) salt

Question 1719:

• JAMB 2013

A metal that forms soluble trioxosulphate (IV) ion is

A. Barium
B. Potassium
C. Manganese
D. Aluminium

Question 1720:

• JAMB 2013

Copper is displaced from the solution of its salts by most metals because it

A. Is a transition element
B. Is at the bottom of the activity series
C. Is very reactive
D. Has completely filled 3d-orbitals