Jamb Chemistry Past Questions and Answers

Question 2001:

• JAMB 2018

In the laboratory preparation of oxygen, the gas cannot be collected by displacement of air because

A. The density of oxygen is greater than that of air
B. The density of air is nearly the same as that of oxygen
C. Oxygen is a component of air
D. Air is an impure substance

Question 2002:

• JAMB 2018

2KClO3(g) MNO3→ 2KCl(s) + 3O2(g)
The importance of the catalyst in the reaction above is that

A. Heating may not be required before the reaction takes place
B. The reaction is controllable even at a high temperature
C. The reaction produces large quantity of oxygen
D. The reaction takes place more rapidly at a lower temperature

Question 2003:

• JAMB 2018

Which of the following is used to power steam engines?

A. Lubricating oil
B. Coal
C. Bitumen
D. Diesel oil

Question 2004:

• JAMB 2018

In the reaction between sodium hydroxide and sulphuric acid solutions, what volume of 0.5 molar sodium hydroxide would exactly neutralise 10cm3 of 1.25 molar sulphuric acid?

A. 5cm\(^3\)
B. 10cm\(^3\)
C. 20cm\(^3\)
D. 50cm\(^3\)

Question 2005:

• JAMB 2018

To what volume must 300cm\(^3\) of 0.60M sodium hydroxide solution be diluted to give a 0.40M solution?

A. 450cm\(^3\)
B. 300cm\(^3\)
C. 200cm\(^3\)
D. 150cm\(^3\)