Jamb Chemistry 1998 Past Questions and Answers

Question 11:

• JAMB 1998

The line observed in the sample hydrogen spectrum are due to emission of?

A. Electrons from the atoms
B. Energy by proton transition
C. Energy by electron transition
D. Neutron from the atom

Question 12:

• JAMB 1998

The property used in obtaining oxygen and nitrogen industrially from air is the?

A. Boiling point
B. Density
C. Rate of diffusion
D. Solubility

Question 13:

• JAMB 1998

Potassium tetraoxomanganate (VII) is often added to impure water to?

A. Reduce organic impurities
B. Reduce inorganic impurities
C. Destroy bacteria and algae
D. Remove permanent hardness

Question 14:

• JAMB 1998

The soil around a battery manufacturing factory is likely to contain a high concentration of?

A. Ca²⁺ salts
B. Pb²⁺ salts
C. Mg²⁺ salts
D. Al³⁺ salts

Question 15:

• JAMB 1998

Excess phosphorus was burnt in a gas jar and the residual gas passed successively over concentrated KOH solution and concentration H₂SO₄ before being collected in a flask. The gases collected are?

A. Carbon (IV) oxide, nitrogen and the rare gases
B. Nitrogen and the rare gases
C. Carbon (IV) oxide, nitrogen (IV) oxide and the rare gases
D. Carbon (IV) oxide