WAEC Chemistry 2018 Objective — Question 31
Question 31 of 50 from the West African Examinations Council (WAEC) Chemistry 2018 Objective paper, with the correct answer and a full explanation.
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When chlorine is passed through a sample of water, the pH of the water sample would
- A. < 7Correct
- B. > 7
- C. equal to 7
- D. 0
Explanation
Chlorine is an acidic gas; when passed into water it forms HCl and HOCl, lowering the pH below 7.
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