Jamb Chemistry 1981 Past Questions and Answers

Question 26:

• JAMB 1981

If an organic compound decolorizes bromine water then the compound is?

A. Saturated
B. Supersaturated
C. Unsaturated
D. A solid
E. Protonated

Question 27:

• JAMB 1981

When air is compressed?

A. Its density decreases
B. It solidifies
C. Its temperature decreases
D. Its temperature increases
E. Its temperature remains unchanged

Question 28:

• JAMB 1981

Fats and oils are?

A. Addition products of long chain fatty acids and alkali
B. Addition products of long-chain fattyy acids and glycerol
C. Condensation products of long-chain fatty acids and glycerol
D. Condensation products of formaldehyde and glycerol
E. Liquids at 20°C

Question 29:

• JAMB 1981

Which of the following statements about phosphorus is NOT correct?

A. Phosphorus is a solid mineral
B. Phosphorus is obtained by oxidation reaction of phosphate
C. Phosphorus exists in two allotropic forms
D. Both forms of phosphorus are interconvertible
E. Yellow phosporus ignites when rubbed on a rough surface

Question 30:

• JAMB 1981

28.8 cm³ of nitrogen at 15°C is cooled to O°C at constant pressure, the new volume of nitrogen is?

A. 17.4 cm³
B. 14.7 cm³
C. 27.3 cm³
D. 31.7 cm³