The experiment shown is for

Kingsley Thompson August 10, 2025



The experiment shown is for

A. investigating the effects of sunlight on coloured gas.
B. the decomposition of chlorine water.
C. the preparation of chlorine gas.
D. the preparation of chlorine water.
E. the purification of drinking water.

The correct answer is B. the decomposition of chlorine water.

Explanation: When chlorine is bubble into water, it form hypochloric acid (HOCl) and hydrogen chloride acid (HCl) commonly called chlorine water. When the mixture is exposed to sunlight as shown in the diagram, oxygen is liberated.

The gas P is
A. chlorine.
B. hydrogen
C. hydrogen chloride.
D. Oxygen.
E. water vapour.
 
The correct answer is D. Oxygen
Explanation: The explanation has been given above.
SOURCE: NECO CHEMISTRY 2001 QUESTION ELEVEN AND TWELVE


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