Jamb Chemistry 2006 Past Questions and Answers

Question 21:

• JAMB 2006

The products of the combustion of candle wax are

A. Hydrogen and water
B. Oxygen and water
C. Carbon (IV) oxide and water
D. Carbon (II) oxide and water

Question 22:

• JAMB 2006

When 50cm² of a saturated solution of sugar of molar mass 342 g at 40^oC was evaporated to dryness, 34.2g of dry solid was obtained. The solubility of sugar at 40^oC is

A. 2.0 mol dm^-3
B. 3.5 mol dm^-3
C. 7.0 mol dm^-3
D. 10.0 mol dm^-3

Question 23:

• JAMB 2006

Which of the following results in the fall of acid rain?

A. Oxides of lead
B. Particulate matter
C. Oxides of sulphur
D. Gaseous hydrocarbon

Question 24:

• 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 25:

• JAMB 2006

When a crystal was added to the clear solution of its salt, the crystal did not dissolve and the solution remained unchange. This showed that the solution was

A. Supersaturated
B. Concentrated
C. Unsaturated
D. Saturated