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Free download in PDF Engineering Chemistry Multiple Choice Questions with Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
61
Application of Kohlrausch law,
[A]
Determination of ionic product of water
[B]
Determination of degree of dissociation
[C]
Determination of equivalent conductance of weak electrolyte
[D]
All of above.
62
Natural water contains..... mg / lit of dissolved oxygen.
[A]
4 - 6
[B]
1 - 2
[C]
8 - 10
[D]
15 – 20
63
.......is called as protective blanket of gases surrounding earth.
[A]
Lithosphere
[B]
Atmosphere
[C]
Biosphere
[D]
Hydrosphere
64
Biosphere is very complex it is divided into smaller units called as_ .
[A]
Biotic system
[B]
Ecosystem
[C]
Biosystem
[D]
Ecology
65
Temp. of thermosphere in environment is _
[A]
-92 to 120 0C
[B]
-92 to 1200 0C
[C]
-92 to 1000 0C
[D]
-92 to 2200 0C
66
Mathematical statement of ohm's law is,
[A]
I = E/R
[B]
E = R/E
[C]
E = I/R
[D]
E =R/I
67
Flow of electricity through electrolytic solution is due to migration of _
[A]
Electrons
[B]
Ions
[C]
Matter
[D]
None of the above
68
Cell constant can be defined as _
[A]
(Specific / Observed) Conductance
[B]
(Observed / Specific) Conductance
[C]
(1 / Specific) Conductance
[D]
(1 / Observed) Conductance
Answer: (Specific / Observed) Conductance
69
The battery used in automobiles is _
[A]
Lead accumulator
[B]
Ni-metal hydride
[C]
Li-MnO2
[D]
Laclanche cell
70
Conductivity of 1cm3 of solution is _
[A]
Equivalent
[B]
Moral
[C]
Molal
[D]
Specific
71
In Lithium batteries, electrolytes can’t acts as aqueous solution because,
[A]
High reactivity of Li with H2O
[B]
Low density of Li w. r. t. H2O
[C]
High electro positivity of Li+
[D]
None of above
Answer: High reactivity of Li with H2O
72
In Li- MnO2 cell _ used as electrolytic solution
[A]
LiO
[B]
LiX in organic solvent
[C]
LiX in inorganic solvent
[D]
LiO in organic solvent
Answer: LiX in organic solvent
73
In Li- MnO2 cell _ acts as separator.
[A]
Polyethene
[B]
Polypropylene
[C]
Polybutylene
[D]
Polymeric Li
74
In methanol - O2 fuel cell anode is Ni- sheet with _ as catalyst.
[A]
Pt
[B]
Pd
[C]
Ag
[D]
Au
75
Hydrogen in metal-hydride is used or acts as anode in _ battery
[A]
Lithium Battery
[B]
Lithium MnO2 cell
[C]
Lead Accumulator
[D]
Ni - metal Hydride battery
Answer: Ni - metal Hydride battery
76
Cell potential of Ni - Metal hydride battery is,
[A]
1.25 to 1.35 V
[B]
0.25 to 1.3 V
[C]
0.25 to 0.35 V
[D]
0.025 to 1.35 V
77
London type of smog which contains SO2, SO3 and humidity is responsible for _ .
[A]
Pollution
[B]
Acid rain
[C]
Global warming
[D]
Ozone layer depletion
78
Fine ash from pulverized fuel (coal) burned in power station is known as _ .
[A]
Coal ash
[B]
Fly ash
[C]
Pulverized ash
[D]
Fuel ash
79
Conversion of Fe to Fe2+ is,
[A]
Oxidation
[B]
Reduction
[C]
Corrosion
[D]
None of above
80
DNA breakage, inhibition, alteration, replication and formation of DNA adduct arises due to,
[A]
Acid rain
[B]
Green house effect
[C]
Global warming
[D]
Ozone layer depletion
Answer: Ozone layer depletion
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