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Identify Bleaching Powder among the given Samples of Chemicals
Identify Bleaching Powder among the given Samples of Chemicals
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1)
Bleaching powder is an example of________________?
Double salt
Mixed salt
Normal salt
Complex
2)
Which one of the following is extensively used for sterilizing water?
Alum
Bleaching powder
Soda powder
Borax powder
3)
Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on ____________________?
Calcium perchlorate
Soda lime
None of these
Slaked lime
4)
Chlorine is used as a bleaching agent. The bleaching action is due to
chlorination
reduction
hydrogenation
oxidation
5)
Which of the following is produced on the reaction of bleaching powder with a few drops of conc. HCl?
Chlorine
Oxygen
Calcium oxide
Hypochlorous acid
6)
Chlorine gas reacts with _______ to form bleaching powder.
dry CaO
dil. solution of Ca(OH)2
dry slaked lime
conc. solution of Ca(OH)2
7)
At what PH , Chlorine in water acts as only hypochlorite ions?
>3
<3
<5
>10
8)
The hypochlorous acid is ……….times effective as hypochorite ions?
20
10
80
50
9)
Bleaching powder contains ………of available chlorine.
16%
100%
33.33%
66.66%
10)
Which of the following is treated with chlorine to obtain bleaching powder?
Mg(OH)2
KOH
CaSO4
Ca(OH)2