What is the oxidation state of chlorine in calcium salt of Bleaching Powder Ca(OCl)2?
Q. Dry slaked lime on reaction with chlorine gives
- Pure anhydrous Calcium chloride
- Bleaching powder
- A combination of , dibasic Calcium hypochlorite - and dibasic Calcium Chloride - .
- Both (A) and (C)
Q. When chlorine is passed over dry slaked lime at room temperature, the main reaction product is
Q. Auto-oxidation of bleaching powder yields:
- Both a and b
Q. Calculate the percentage of available chlorine in a sample of 3.546 g of bleaching powder which was dissolved in 100 mL of water, 25 mL of this solution, when treated with acetic acid and excess KI , required 20 mL of 0.125 N sodium thiosulphate solution.
Q. 1.25 g of bleaching powder when treated with acetic acid and excess of KI, liberated iodine which required 37.5 mL of 0.2 N sodium thiosulphate solution. Calculate the percentage of available chlorine in the sample of bleaching powder.
Q. Bleaching powder is obtained by
Q. 1.25 g sample of bleaching powder is dissolved in 100 mL of water and 25 mL of which is treated with KI solution. The iodine so liberated required 12.5 mL of N25 hypo solution. Find the percentage of chlorine available from the sample of bleaching powder
- 5.68 %
- 10.09 %
- 15.31 %
- 12.31 %
Write two uses of ClO2?
Q. Bleaching of flowers by Cl2 is permanent while bleaching by SO2 is temporary. Why?