Jamb Chemistry Past Questions and Answers

Question 1771:

• JAMB 2014

In the extraction of sodium from fused sodium chloride, the anode is made of platinum because

A. Sodium is formed at the anode
B. Chlorine is formed at the anode
C. Sodium does not react with platinum
D. Chlorine does not react with platinum

Question 1772:

• JAMB 2014

In the electrolytic extraction of cacium from calcium chloride, the cathode is

A. Zinc
B. Graphite
C. Platinum
D. Iron

Question 1773:

• JAMB 2014

A compound that gives a brick-red colour to a non-luminous flame is likely to contain

A. Copper ions
B. Sodium ions
C. Calcium ions
D. Aluminium ions

Question 1774:

• JAMB 2014

A few drops of NaOH solution was added to an unknown salt forming a white precipitate which is insoluble in excess solution. The cation likely present is

A. Zn²⁺
B. Pb²⁺
C. Ca²⁺
D. Al³⁺

Question 1775:

• JAMB 2014

The general formula of haloalkanes where X represents the halide is

A. C_n H _2n-1X.
B. C _nH _2nX.
C. C _nH _2n+2 X
D. C _nH _2n+1X