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Halogens - 2
1.
Bleaching powder decomposes in water to give calcium chloride and calcium oxychloride.
a) False
b) True
2.
The formula of hypochlorous acid is (HClO).
a) True
b) False
3.
Hypochlorous acid decomposes readily to atomic oxygen.
a) True
b) False
4.
Chlorine is less reactive than bromine and iodine.
a) False
b) True
5.
The colour of silver Bromide is bright yellow.
a) True
b) False
6.
The colour of chlorine gas is
a) Reddish brown
b) Greenish yellow
c) Yellow
d) Colourless
7.
Chlorine reacts with dichloromethane to produce
a) Chloromethane
b) Carbon tetrachloride
c) Choloroform
d) All of the above
8.
The formula of sodium hypochlorite is
a) Na(OCl)
2
b) NaClO
c) NaClO
3
d) NaClO
2
9.
Which element can not be displaced from its salts by the action of chlorine.
a) Iodine
b) Bromine
c) Fluorine
d) Astatine
10.
Which condition is essential to complete the reaction of chlorine with hydrocarbons.
a) Sunlight
b) Pressure
c) None of the above
d) Temperature
11.
Which one is not a use of chlorine
a) Making insecticides
b) Synthesizing rubber
c) Sterilizing water
d) Bleaching wood pulp
12.
Chlorine reacts with hot and concentrated solution of alkalies to give
a) Chlorate
b) Both a & b
c) Hypochlorite
d) None
13.
Chlorine reacts with carbon monoxide in the presence of sunlight to produce.
a) Phosgene
b) Carbon tetrachloride
c) Phosphine
d) All of the above
14.
Chemical formula of bleaching powder is
a) CaCl(OCl)
b) Ca(OCl)
2
c) CaClO
d) CaClO
3
15.
Slaked lime is converted into bleaching powder by absorbing chlorine
a) 25 - 27%
b) 27 - 30%
c) 35 - 37%
d) 37 - 40%
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