CHM 102 | Study Mode

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Question 31
A
no reaction takes place
B
the colour of solution fades away
C
the surface of iron nails acquire a black coating
D
the colour of solution changes to green
Explanation

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Correct option: D
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Question 32
A
X = Fe, Y = Fe2O3
B
X = Ag, Y = Ag2S
C
X = Cu, Y = CuO
D
X = Al, Y = Al2O3
Explanation

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Correct option: A
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Question 33
A
Sodium
B
Aluminium
C
Gold
D
Iron
Explanation

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Correct option: D
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Question 34
A
calcium
B
carbon
C
iron
D
silicon
Explanation

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Correct option: C
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Question 35
A
oxygen
B
silicon
C
aluminium
D
iron
Explanation

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Correct option: D
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Question 36
A
only zinc reacts with dil. HC1
B
only copper reacts with dil. HC1
C
both zinc and copper react with dil. HC1
D
only copper reacts with water
Explanation

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Correct option: A
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Question 37
A
CuCo3
B
Cu(OH)2
C
Cu(OH)2.CuCO3
D
CuO
Explanation

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Correct option: A
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Question 38
A
ordinary water
B
distilled water
C
both ordinary and distilled water
D
none of the above
Explanation

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Correct option: C
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Question 39
A
Cu and Zn
B
Zn and Ni
C
Cu and Sn
D
Cu, Zn, Tn
Explanation

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Correct option: C
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Question 40
A
Ag2O
B
Ag2S
C
AgCN
D
Ag2O and Ag2S Page 2
Explanation

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Correct option: B

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