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Online Tests
Chemistry 9th Class English Medium Unit 7 Online Test MCQs With Answers
Question # 1
Which one of the following is not an electrolyte?
Choose an answer
sugar solution
sulphuric acid solution
Lime solution
Sodium chloride solution
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Question # 2
Electrolyte is ____________ solid form.
Choose an answer
in
Sometimes in
Never in
Always in
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Question # 3
Which one of the following is not an electrolytic cell:
Choose an answer
Down cell
Galvanic cell
Nelson' cell
Both a and c
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Question # 4
____________ is an irreversible cell.
Choose an answer
Dry cell
Chargeable cell
Zn cell
None of these
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Question # 5
____________ agents gains electrons in chemical reaction.
Choose an answer
Reduction
Oxidation
Both
None of these
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Question # 6
Formation of water form hydrogen and oxygen is:
Choose an answer
Redox reaction
Acid-base reaction
Neutralization
Decomposition
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Question # 7
Which one of the following is a galvanic cell?
Choose an answer
Daniel cell
Nelson's cell
Down's cell
Both B and C
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Question # 8
____________ is prevented by Metallic coating.
Choose an answer
NaCl
Rust
All
None of these
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Question # 9
Addition of OXYGEN is called.
Choose an answer
Reduction
Conduction
Oxidation
Nil
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Question # 10
Brine is an aqueous solution of
Choose an answer
NaCI
NaOH
AgNO3
CaO
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Question # 11
The cathode of Nelson's cell is made up of
Choose an answer
C
Zn
Cu
Fe
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Question # 12
CO2 the oxidation number of C =.
Choose an answer
+1
+2
+3
+4
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Question # 13
By electrolytic refining of copper , it is ____________ % pure.
Choose an answer
98
99
99.99
100
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