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9th Class Chemistry Chapter 7 Electrochemistry English Medium KPK Boards Online Test MCQs With Answers
Question # 1
Electrolyte is ____________ solid form.
Choose an answer
in
Sometimes in
Never in
Always in
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Question # 2
The most common example of corrosion is:
Choose an answer
Chemical decay
Rusting of iron
Rusting of aluminum
Rusting of tin
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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 prevented by Metallic coating.
Choose an answer
NaCl
Rust
All
None of these
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Question # 5
It is a strong electrolyte
Choose an answer
H2O
CH3COOH
NaOH
C6H6
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Question # 6
____________ cell is made of two half of cells.
Choose an answer
Zinc cell
Galvanic
Both
All
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Question # 7
Copper extracted from its ore is ____________ % pure.
Choose an answer
98%
99%
96%
Nil
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Question # 8
Metals are covered by using.
Choose an answer
Baeyer's test
Bohr's
Electrolysis
None
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Question # 9
Oxidation means
Choose an answer
Gain of oxygen
Removal of oxygen
Gain of hydrogen
Gain of electrons
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Question # 10
In peroxides, the oxidation no. of O is
Choose an answer
+1
-1
+3
-3
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Question # 11
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 # 12
Gain of electrons in a reaction is called ____________reaction.
Choose an answer
Oxidation
Reduction
Both
Nil
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