A single tablet of 0.5 g is sufficient to disinfect 20 litres of water
Two tablets of 0.5 g are sufficient to disinfect 20 litres of water
A single tablet of 0.5 g is sufficient to disinfect 1 litre of water
Two tablets of 0.5 g are sufficient to disinfect 1 litre of water
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The Correct Option isA
Solution and Explanation
Step 1: Understand the use of chlorine tablets for water purification.
A single 0.5 g chlorine tablet is sufficient to disinfect 20 litres of water, making it an efficient method for purifying water in households.