Separation of mixtures and purification of chemical substances - Jamb Chemistry Past Questions and Answers

Question 96:

• JAMB 2013

2H₂O _(l) + 2F_2(g) → 4HF_(aq) + O_2(g).
In the reaction above, the substance that is being reduced is

A. O_2(g)
B. H₂O_(l)
C. F_2(g)
D. HF_(aq)

Question 97:

• JAMB 2013

Use the following option above to answer this question. Which of the following compounds in solution will turn red litmus paper blue?

A. A
B. B
C. C
D. D

Question 98:

• JAMB 2014

A mixture is different from a compound because

A. The properties of a compound are those of its individual constituents while those of a mixture differ from its constituents
B. A mixture is always homogeneous while a compound is not
C. The constituent of a compound are chemically bound together while those of a mixture are not
D. A mixture can be represented by a chemical formula while a compound cannot

Question 99:

• JAMB 2014

A mixture is different from a compound because

A. The properties of a compound are those of its individual constituents while those of a mixture differ from its constituents
B. A mixture is always homogeneous while a compound is not
C. The constituent of a compound are chemically bound together while those of a mixture are not
D. A mixture can be represented by a chemical formula while a compound cannot

Question 100:

• JAMB 2014

The gas that is removed by the water in the flask is

A. O₂
B. SO₂
C. HCI.
D. H₂