Why should bleaching powder be stored in a dry closed container?
Answer and explanation
Correct answer: To reduce loss of available chlorine
Bleaching powder, commonly represented as calcium oxychloride, is effective because it supplies available chlorine. Moisture, carbon dioxide, and prolonged exposure to air can cause decomposition and reduce this available chlorine, lowering its bleaching and disinfecting power. A dry, tightly closed container limits these effects and preserves the substance. The other options describe no valid storage purpose, so option A is correct.
Frequently asked questions
What is the correct answer to this question?
To reduce loss of available chlorine
Why is this the correct answer?
Bleaching powder, commonly represented as calcium oxychloride, is effective because it supplies available chlorine. Moisture, carbon dioxide, and prolonged exposure to air can cause decomposition and reduce this available chlorine, lowering its bleaching and disinfecting power. A dry, tightly closed container limits these effects and preserves the substance. The other options describe no valid storage purpose, so option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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