Chemistry | Study Mode

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Question 31
A
3.55
B
2.55
C
0.02
D
0.55
Explanation
2g of H2SO4 is in 1000cm3 of water Mass conc. =2g/dm3
molar conc. = mass conc./ molar mass 2/98 0.O2gIdm-3

Correct option: C
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Question 32
A
They are more polar than alkanol
B
They have two oxygen atoms while alkatiols have one
C
They form two hydrogen bonds while alkanols form one
D
They form hydrogen bonds while alkanols do not.
Explanation
Alkanoic acid is less volatile because it is more stable compact to alkanol, it form dimmers that is two molecule are bonded at 2-site by hydrogen bond



Correct option: C
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Question 33
A
0.2
B
0.39
C
0.4
D
0.5
Explanation
Ni --> Ni2+ + 2e-
At step 1 mole 2F
No. of mole = P.K
EK
= 0.513mole
0.513mole of Nickel will be deposited by 0.1F
0.2mole of Nickel will be deposited by = 0.389F
0.4F

Correct option: C
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Question 34
A
Anode and a direct current is used
B
Cathode and an alternating current is used
C
Anode and an alternating current is used
D
Cathode and direct current is used.
Explanation
As the current is passed through the cell, the plating metal dissolve at the anode, and the ion produced migrate to the
cathode, where they are discharge and deposited as a layer on the object by direct current (D).

Correct option: D
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Question 35
A
Its density decreases
B
It liquefies
C
Its temperature decreases
D
Temperature increases
Explanation
When air is compressed, it becomes liquefied
(B)

Correct option: B
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Question 36
A
Manufacture of toothpaste
B
Treatment of goiter
C
Vulcanization of rubber
D
Sterilization water
Explanation
MnO2 + 4HCl
Chlorine is used in the treatment of water or for
sterilization. (D)

Correct option: D

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