Jamb Chemistry 2006 Past Questions and Answers

Question 26:

• JAMB 2006

A particle that contains 11 protons, 12 neutrons and 10 electrons is probably a

A. Neutral non-metal
B. Metallic ion
C. Non-metallic ion
D. Neutral metal

Question 27:

• JAMB 2006

A difference between chemical and physical change is that in a chemical change

A. Oxygen is consumed
B. Heat is supplied
C. A reversible process oocurs
D. A new substance is formed

Question 28:

• JAMB 2006

The volume of 2.5 moles of oxygen at s.t.p is
[Molar volume of a gas at s.t.p = 22.4 dm³]

A. 50.0 dm³
B. 84.0 dm³
C. 28.0 dm³
D. 56.0 dm³

Question 29:

• JAMB 2006

Nuclear fission involves the splitting of a heavy element into two nuclei of

A. Nearly equal masses with a relaese of energy and radiaton
B. Equal masses with a relaese of energy
C. Equal masses with a release of energy and radiation
D. Unequal masses without any relaese of energy

Question 30:

• JAMB 2006

What is the molar mass of a substance, if 0.4 mole of the substance has a mass of 25.0g?

A. 62.5 g
B. 40.0 g
C. 6.3 g
D. 2.5 g