Bleaching Powder

Q. Calculate the percentage of available chlorine in a sample of $3.546g$ of bleaching powder which was dissolved in $100mL$ of water, $25mL$ of this solution, when treated with acetic acid and excess $KI$ , required $20mLof0.125N$ sodium thiosulphate solution.

1. $15.01\%$
2. $0.1\%$
3. $10.01\%$
4. $20.02\%$

Q. When chlorine is passed over dry slaked lime at room temperature, the main reaction product is

1. $Ca(OCl{)}_2$
2. $Ca(Cl{O}_2{)}_2$
3. $CaC{l}_2$
4. $CaOC{l}_2$

Q.

What is the oxidation state of chlorine in calcium salt of Bleaching Powder $Ca(OCl{)}_2$?

1. -1

2. -2

3. $+\frac{1}{2}$

4. +1

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 $\frac{N}{25}$ hypo solution. Find the percentage of chlorine available from the sample of bleaching powder

1. 5.68 %
2. 10.09 %
3. 15.31 %
4. 12.31 %

Q. Dry slaked lime on reaction with chlorine gives

1. Pure anhydrous Calcium chloride
2. Bleaching powder
3. A combination of $Ca(OCl{)}_2$, dibasic Calcium hypochlorite - $C{a}_3\left(OCl{)}_2\right(OH{)}_4$ and dibasic Calcium Chloride - $C{a}_{3}C{l}_2(OH{)}_4$.
4. Both (A) and (C)