Jamb Chemistry Past Questions and Answers

Question 1701:

• JAMB 2013

Steam changes the colour of anhydrous cobalt (ll) chloride from

A. White to red
B. Blue to white
C. Blue to pink
D. White to blue

Question 1702:

• JAMB 2013

An example of a hygroscopic substance is

A. CuO _(S).
B. MgCL_2(S).
C. CaCL_2(S).
D. NaOH_(S).

Question 1703:

• JAMB 2013

If 24.4 g of lead (ll) trioxonitrate (V) were dissolved in 42 g of distilled water at 20^oC; calculate the solubility of the solute in gdm^-3.

A. 581.000.
B. 0.581
C. 5.810
D. 58.100

Question 1704:

• JAMB 2013

The solvent used for removing grease stain is

A. Turpentine
B. Ammonia solution
C. Ethanol
D. Solution of borax in water

Question 1705:

• JAMB 2013

In a water body, too much sewage leads to

A. A decrease in the temperature of the water which cause in death of aquatic animals
B. An increase in the number of aquatic animals in the water
C. An increase in the bacterial population which reduces the level of oxygen in the water
D. A decrease in the bacterial population which increases the level of oxygen in the water