This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
All are true regarding bleaching powder, except - 
Select and explain. 
A. Contains about 33% of available chlorine, B. It is stable compound, C. White amorphous compound, D. Strong bleaching agent
B: It is stable compound
Answer: B: It is stable compound 
Explanation: Bleaching powder (Chlorinated lime) CaOCl2 It is a white amorphous powder with a pungent smell which contains 33% of available chlorine. It is an UNSTABLE compound. It can be stabilised by mixing with an excess of lime. It should be stored in dark, cool and dry place in a closed container that is resistant to corrosion. Park's Textbook of Preventive and Social Medicine, 25th edition, Page No. 776