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9th Class Chemistry Chapter 7 Electrochemistry English Medium KPK Boards Online Test MCQs With Answers
Question # 1
In silver plating Anode is made of:
Choose an answer
Gold
Ag
Neon
Nil
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Question # 2
____________ agents gains electrons in chemical reaction.
Choose an answer
Reduction
Oxidation
Both
None of these
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Question # 3
____________ cell is made of two half of cells.
Choose an answer
Zinc cell
Galvanic
Both
All
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Question # 4
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 # 5
Gain of electrons in a reaction is called ____________reaction.
Choose an answer
Oxidation
Reduction
Both
Nil
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Question # 6
The cathode of Daniel cell is made up of
Choose an answer
Zn
Cu
AI
C
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Question # 7
In peroxides, the oxidation no. of O is
Choose an answer
+1
-1
+3
-3
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Question # 8
Films are coated by special chemical known as ____________ detectors.
Choose an answer
Photographic
Image
Nil
Both
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Question # 9
Metals are covered by using.
Choose an answer
Baeyer's test
Bohr's
Electrolysis
None
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Question # 10
Reduction means
Choose an answer
Removal of H2
Removal of electrons
Gain of electrons
Gain of O2
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Question # 11
Br2 + H2S __ 2HBr + S, which one is oxidizing agent:
Choose an answer
H2S
Br2
S
2HBr
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