Jamb Chemistry 2011 Past Questions and Answers

Question 31:

• JAMB 2011

A few drops of concentrated HNO\(_3\) is added to an unknown solution and boiled for a while. If this produces a brown solution, the cation present is likely to be

A. Pb²⁺
B. Cu²⁺
C. Fe³⁺
D. Fe²⁺

Question 32:

• JAMB 2011

The bleaching action of chlorine gas is effective due to the presence of

A. Hydrogen chloride
B. Water
C. Air
D. Oxygen

Question 33:

• JAMB 2011

In the laboratory preparation of oxygen, dried oxygen is usually collected over

A. Hydrochloric acid
B. Mercury
C. Calcium chloride
D. Tetraoxosulphate (VI) acid

Question 34:

• JAMB 2011

The property of concentrated H₂SO₄ that makes it suitable for preparing HNO₃ is its

A. Boiling point
B. Density
C. Oxidizing properties
D. Dehydrating properties

Question 35:

• JAMB 2011

Bronze is preferred to copper in the making of medals because it

A. Is stronger
B. Can withstand low temperature
C. Is lighter
D. Has low tensile strength