Chemistry 2010 Jamb Past Questions and Answers

Question 1 :

• JAMB 2010

Which of the following is an example of a mixture?

A. Common salt
B. Blood
C. Sand
D. Washing soda

Question 2 :

• JAMB 2010

Which of the following is an example of a mixture?

A. Common salt
B. Blood
C. Sand
D. Washing soda

Question 3 :

• JAMB 2010

Calculate the percentage by mass of nitrogen in calcium trioxonitrate (V)
[Ca = 40, N = 14, O = 16]

A. 8.5%
B. 13.1%
C. 17.1%
D. 27.6%

Question 4 :

• JAMB 2010

The droplets of water observed around a bottle of milk taken out of the refrigerator is due to the fact that the

A. Water vapour in the air around the bottle gains some energy from the bottle
B. Temperature of the milk drops as it loses heat into the surroundings
C. Saturated vapour pressure of the milk is equal to the atmospheric pressure
D. Water vapour in the air around the bottle loses some of its energy to the bottle

Question 5 :

• JAMB 2010

The volume of a given gas is V cm³P mm Hg. what is the new volume of the gas if the pressure is reduced to half at constant temperature

A. 4 V cm³
B. 2 V cm³
C. V/2 cm³
D. V cm³