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How many kg of bleaching powder is needed per day to chlorinate 4 MLD of water so than, after 40 minutes of contact, there remains residual chlorine of 0.25 mg/l. The input water has a chlorine demand of 1.25 mg/l. And that the bleaching powder has only 25% available chlorine. 
In the following question, two statements are numbered as A and B. On solving these statements we get quantities A and B respectively. Solve for the both quantities and choose the correct option. Quantity A: Two powders P and Q are to be mixed in ratio 4 ∶ 7 to form a mixture. If 28 kg of powder P and 28 kg of powder Q is available, how much powder Q is more required to make the desired mixture? Quantity B: A mixture is formed by mixing 16 kg of powder X and 25 kg of powder Y. How much powder X is required to be mixed with 40 kg of powder Y to make a mixture of the same ratio?
Which of the following is not a bleaching agent? A. Sodium hypochlorite B. Calcium hypochlorite C. Hydrogen peroxide D. Hydrogen sulphide
Determine the quantity of bleaching powder required for a rural water supply scheme so as to chlorinate 20000 litre of water, whose chorine demand is 2 mg/l. Assume the bleaching powder has 50 % available chlorine.
How much bleaching powder (having 20% available chlorine) is needed to disinfect 10,000 litres of water whose chlorine demand is 1.0 mg/l? It should  be ensured that, after about 1 hour contact time, 0.2 mg/l chlorine is available.
The most active ingredient in bleaching powder is A. Iodine B. Calcium hypochlorite C. Nitric acid D. Ammonium sulphate
An aqueous solution with chlorine 30 g/L and an organic compound with no chlorine at the rate 50 L/min were put into an extraction machine and produced aqueous solution with chlorine 5 g/L and organic compound with chlorine 10 g/L, what is the rate of aqueous solution?
108 kg of mixture C was prepared by mixing equal quantities of mixtures A and B, made up of chalk powder and brick powder, such that the ratio of chalk and brick powder in mixture C is 17 ∶ 10. If mixture A comprised of 22 kg chalk powder, how much brick powder was present in mixture B?
Which of the following is not a use of calcium chloro hypochlorite?
Bleaching powder is produced by the action of chlorine on dry slaked lime. Which of the following is appropriate equation for this?