Water - Jamb Chemistry Past Questions and Answers

Question 56:

• JAMB 2006

Water has the ability to dissolve almost all substance because its molecules has a structure with

A. One positive end and one neutral end
B. One positive end and one negative end
C. Two negative ends
D. Two positive ends

Question 57:

• JAMB 2007

An element used in the production of matches is

A. Nitrogen
B. Aluminium
C. Copper
D. Sulphur

Question 58:

• JAMB 2007

The tincture of iodine means iodine dissolved in

A. Ethanol
B. Bromine chloride
C. Chlorine water
D. Water

Question 59:

• JAMB 2007

Dissolving some pellets of NaOH in water would result in

A. A decrease in the free energy of the solution
B. A decrease in the entropy of the solution
C. A lowering of the temperature of te solution
D. An increase in the entropy of the solution

Question 60:

• JAMB 2007

When temporary hard water is boiled for sometime in a kettle, the inner surface of the kettle becomes coated with a deposit of

A. Calcium tetraoxosulphate(VI)
B. Calcium trioxocarbonate (IV)
C. Calcium hydrogentrioxocarbonate (IV)
D. Aluminium trioxocarbonate (IV)