CHM 102 | Study Mode

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Question 21
A
a white solid
B
undergoes redoc reaction
C
to avoid action by sunlight
D
none of the above
Explanation

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Correct option: C
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Question 22
A
H2S
B
AgS
C
AgSO4
D
Ag2S
Explanation

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Correct option: D
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Question 23
A
crystals immediately melt
B
a brown residue is left
C
white fumes appear in the tube
D
a yellow residue is left
Explanation

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Correct option: B
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Question 24
A
The surface of metal becomes shining
B
The reaction mixture turns milky
C
Odour of a pungent smelling gas is recorded
D
A colourless and odourless gas is evolved
Explanation

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Correct option: D
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Question 25
A
calcium hydroxide is formed
B
white precipitate of CaO is formed
C
lime water turns milky
D
colour of lime water disappears.
Explanation

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Correct option: C
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Question 26
A
black
B
white
C
yellow
D
pink
Explanation

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Correct option: B
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Question 27
A
Electrolysis of water
B
Dissolution of NH4Cl in water
C
Burning of L.P.G.
D
Decomposition of AgBr in the presence of sunlight
Explanation

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Correct option: C
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Question 28
A
adding antioxidants
B
storing food away from light
C
keeping food in refrigerator
D
all of these
Explanation

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Correct option: D
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Question 29
A
combination reaction
B
redox reaction
C
exothermic reaction
D
all of these reactions
Explanation

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Correct option: A
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Question 30
A
displacement reaction
B
combination reaction
C
double displacement reaction
D
redox reaction
Explanation

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Correct option: C

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