Chemistry SSC CGL Questions

SSC CGL-General Awareness

Chemistry MCQ Questions


7.
Which of the following is a characteristic of amorphous solids?
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A.
A definite and characteristic enthalpy of fusion
B.
Melting at a sharp and characteristic temperature
C.
A definite characteristic geometrical shape
D.
Gradual softening over a range of temperatures
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ANSWER :
D. Gradual softening over a range of temperatures
8.
Which of the following techniques can be used for reducing the total dissolved solids (TDS) in water?
(1) Ion Exchange
(2) Distillation
(3) Carding
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A.
Only 1
B.
Only 3
C.
Both 1 and 2
D.
Both 2 and 3
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ANSWER :
C. Both 1 and 2
9.
What is the atomic number of nitrogen?
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A.
6
B.
8
C.
7
D.
5
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ANSWER :
C. 7
10.
Irrespective of the source, pure water contains _________ of oxygen by mass.
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A.
35.42%
B.
88.89%
C.
56.83%
D.
11.11%
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ANSWER :
B. 88.89%
11.
One mole of an ideal gas occupies a volume of ________ litre at 273 K and 1 atm pressure.
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A.
21.2
B.
25.1
C.
20.3
D.
22.4
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ANSWER :
D. 22.4
12.
Carbon monoxide contains approximately _________ of oxygen for each 1.00 g of carbon.
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A.
0.23 g
B.
2.66 g
C.
1.33 g
D.
4.11 g
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ANSWER :
C. 1.33 g