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Online Tests
Chemistry 9th Class English Medium Online Test MCQs With Answers
Question # 1
The oxidation number of chromium in K
2
Cr
2
O
7
is:
Choose an answer
+2
+6
+7
+14
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Question # 2
The symbol of barium is:
Choose an answer
Ba
Bi
Br
B
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Question # 3
biology bis classified as ___________ science.
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Engineering
Physical
Natural
Chemical
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Question # 4
____________ of copper is done by electrolysis.
Choose an answer
Production
Refining
Both
Nil
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Question # 5
Which one metal can be cut with a knife?
Choose an answer
Na
Mg
AI
Ca
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Question # 6
The no. of electrons in the valence shell of alkali metals is
Choose an answer
1
2
4
7
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Question # 7
____________ cell is made of two half of cells.
Choose an answer
Zinc cell
Galvanic
Both
All
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Question # 8
Which one metal is least reactive?
Choose an answer
K
Fe
Cu
AI
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Question # 9
Reduction means
Choose an answer
Removal of H2
Removal of electrons
Gain of electrons
Gain of O2
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Question # 10
105 elements were discovered by the year ________________
Choose an answer
1984
1974
1086
1996
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Question # 11
The lowest energy level is
Choose an answer
K
L
M
N
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Question # 12
The simplest of these has formula:
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C60
C10
V20
C30
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Question # 13
All non-metals are non-conductor of heat and electricity except it
Choose an answer
Phosphorous
Sulphur
Graphite
Iodine
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