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9th Class Chemistry Chapter 7 Electrochemistry English Medium KPK Boards Online Test MCQs With Answers
Question # 1
Oxidation means
Choose an answer
Gain of oxygen
Removal of oxygen
Gain of hydrogen
Gain of electrons
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Question # 2
During the formation of water from hydrogen and oxygen, which of the following does not occur?
Choose an answer
Hydrogen has oxidized
oxygen has reduced
oxygen gains electrons
hydrogen behaves as oxidizing agent
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Question # 3
Films are coated by special chemical known as ____________ detectors.
Choose an answer
Photographic
Image
Nil
Both
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Question # 4
Copper extracted from its ore is ____________ % pure.
Choose an answer
98%
99%
96%
Nil
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Question # 5
____________ do not conduct electricity.
Choose an answer
Electrolyte
Non-electrolyte
Both
Nil
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Question # 6
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 # 7
____________ cell is made of two half of cells.
Choose an answer
Zinc cell
Galvanic
Both
All
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Question # 8
It is a strong electrolyte
Choose an answer
H2O
CH3COOH
NaOH
C6H6
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Question # 9
The cathode of Nelson's cell is made up of
Choose an answer
C
Zn
Cu
Fe
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Question # 10
____________ agents gains electrons in chemical reaction.
Choose an answer
Reduction
Oxidation
Both
None of these
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Question # 11
The cathode of Daniel cell is made up of
Choose an answer
Zn
Cu
AI
C
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Question # 12
Reduction means
Choose an answer
Removal of H2
Removal of electrons
Gain of electrons
Gain of O2
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