Chemistry SSC CGL Questions

SSC CGL-General Awareness
Chemistry

Chemistry MCQ Questions


1.
Urea, a commonly used nitrogen-based fertiliser, is prepared by the reaction between ammonia and _________.
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A.
carbon dioxide
B.
hydrogen
C.
oxygen
D.
sulphur
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ANSWER :
A. carbon dioxide
2.
Acidic nature of soil is shown by high concentration of _________.
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A.
hydrogen
B.
phosphorous
C.
nitrogen
D.
oxygen
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ANSWER :
A. hydrogen
3.

Which of the following is correctly paired?
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A.

Cyanide ion - CN–

B.

Ammonia - OH–

C.

Bromide ion - F–

D.

Fluoride ion - Cl–

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ANSWER :
A. Cyanide ion - CN–
4.
How many electrons are there in the outermost shell of a group 16 element?
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A.
5
B.
4
C.
3
D.
6
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ANSWER :
D. 6
5.
In the flocculation method of water treatment _________ chemical is added to water.
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A.
electro-neutral
B.
low negatively charged
C.
positively charged
D.
high negatively charged
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ANSWER :
C. positively charged
6.
Nitrogen is a _________ element.
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A.
diatomic
B.
tetra-atomic
C.
poly-atomic
D.
monoatomic
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ANSWER :
A. diatomic
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