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Sulphur And Its Compounds - 4
1.
The percentage occurrence of sulphur in the earth crust is ________.
a) 1%
b) 0.01%
c) 10%
d) 0.1%
2.
The chemical formula of galena is ________.
a) FeS
2
b) ZnS
c) HgS
d) PbS
3.
Gypsum is an ore of ________.
a) Carbon
b) Silicon
c) Phosphorus
d) Sulphur
4.
The shape of monoclinc sulphur is ________.
a) Irregular
b) Octahedral
c) Needle like
d) Cubic
5.
________ is an unstable allotrope of sulphur.
a) Rhombic
b) None of the above.
c) Monoclinic
d) Plastic
6.
Under ground deposits of sulphur are found 200 meters below the surface of the earth and contain about ________ of free sulphur.
a) 60 - 70%
b) 10 - 20%
c) 50%
d) 100%
7.
The Valency of sulphur in sodium sulphide (Na
2
S) is ________.
a) 6
b) 1
c) 4
d) 2
8.
In contact process, the oxidation of SO
2
to SO
3
takes place at ________.
a) 400
o
C
b) 550
o
C
c) 450
o
C
d) 500
o
C
9.
Sulphuric acid can dehydrate glucose into ________.
a) Carbonic acid
b) Carbon monoxide
c) Carbon monoxide
d) Carbon
10.
2H
2
SO
4
(conc) + Zn(s) heat------>
a) 2ZnSO
4
(aq)+2H
2
(g)
b) ZnSO
4
(aq) + H
2
(g)
c) ZnSO
4
(aq)+2H
2
O(l)+ SO
2
(g)
d) ZnSO
4
(aq) + H
2
O(l) + SO
2
(g)
11.
__________ acid is used as a dehydrating agent and an electrolyte in lead accumulators.
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12.
H
2
SO
4
acts as a strong oxidizing agent and during the reaction acid itself is reduced to ________.
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13.
_________ can absorb water from sugar leaving behind carbon.
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14.
SO
2
is oxidized to SO
3
during contact process in the presence of a catalyst ________.
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