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Q: At lower pH, the contact period required for chlorination is
  • A. Lower
  • B. Higher
  • C. Same
  • D. None of the above
Correct Answer: Option A - Lower pH value increases the effectiveness of chlorine and hence require lower contact period. • As compared to higher pH value, the contact period required for efficient chlorination at lower pH value is smaller.
A. Lower pH value increases the effectiveness of chlorine and hence require lower contact period. • As compared to higher pH value, the contact period required for efficient chlorination at lower pH value is smaller.

Explanations:

Lower pH value increases the effectiveness of chlorine and hence require lower contact period. • As compared to higher pH value, the contact period required for efficient chlorination at lower pH value is smaller.