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Quiz 7
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Q.1
The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of
atomic structure
metallurgy
periodic table of contents
discovery of elements
Q.2
The mass number of an atom is equal to
the number of protons
the number of protons and electrons
the number of nucleons
the number of neutrons
Q.3
The maximum number of covalent formed by nitrogen is
1
2
3
4
Q.4
________ is a by product of sewage treatment and can be decomposed to produce biogas
Sewage
Sludge
Sewer
Scum
Q.5
Water can be separated from alcohol water mixture by
Decantation
Evaporation
Distillation
Sublimation
Q.6
The gas used to dilute oxygen for breathing by deep sea divers is:
Neon
Argon
Nitrogen
Helium
Q.7
The National Chemical Laboratory (India) is located in
Mumbai
Bangaluru
Hyderabad
Pune
Q.8
An oxidising agent is a
An electron acceptor
An electron donor
In a chemical reaction its oxidation number increases
It releases H
2
in a chemical reaction
Q.9
Silver gets corroded due to ________ in air.
Oxygen
Hydrogen Sulphide
Carbon dioxide
Nitrogen
Q.10
Which among the following is used to dilute oxygen in the gas cylinders used by divers ?
Krypton
Argon
Helium
Neon
Q.11
Copper substances when exposed to air gains a green coating due to the formation of:
CuO
CuCO
3
Cu(OH)
2
CuSO
4
Cu(NO
3
)
2
Q.12
The gas that is used in the manufacture of vanaspati ghee is :
Oxygen
Carbon dioxide
Hydrogen
Nitrogen
Q.13
Which one of the following metals does not react with water to produce Hydrogen ?
Potassium
Cadmium
Sodium
Lithium
Q.14
Element 106 was discovered by
Rutherford
Seaborg
Lawrence
Kurchatove
Q.15
Sea water can be purified by the process of
Distillation
Evaporation
Filtration
Fractional distillation
Q.16
The percentage of oxygen in air is approximately
100%
1%
78%
21%
Q.17
The major constituent of air is
Nitrogen
Carbon dioxide
Oxygen
Hydrogen
Q.18
Which of the following gases will effuse out of football bladder most quickly ?
He
H
2
N
2
O
2
Q.19
Name two elements that find wide application in transistor industry.
Silicon and Germanium
Carbon and Platinum
Iridium and Germanium
Tungsten and Platinum
Q.20
The formula C
6
H
5
-CO-CH
3
represents
Acetone
Acetic acid
Acetophenone
Phenyl acetate
Q.21
In addition to hydrogen, the other abundant element present on Sun’s surface is
Helium
Neon
Argon
Oxygen
Q.22
The most abundant element in the human body is
Carbon
Iron
Nitrogen
Oxygen
Q.23
The most abundant element in the earth’s atmosphere is
Argon
Nitrogen
Oxygen
Krypton
Q.24
Who is known as the 'father of modern chemistry'?
John Dalton
Robert Boyle
Antoine Lavoisier
Democritus
Q.25
Which of the following is the petroleum wax ?
Bees wax
Carnauba wax
Paraffin wax
Jojoba wax
Q.26
Petroleum is a mixture of
Elements
Hydrocarbons
Polymers
Salts
Q.27
Which of the following causes the rusting of iron?
a. Oxidation
b. Reduction
c. Chemical reaction with oxygen
d. Chemical reaction with CO
2
A and B
B and C
C and D
A and C
Q.28
Photo-oxidation process is initiated by
Light
Heat
Oxygen
Catalyst
Q.29
L.P.G. is mostly liquefied
Hydrogen
Oxygen
Butane
Methane
Q.30
Browning of paper in old books is caused by
Frequent use
Lack of aeration
Collection of dust
Oxidation of cellulose
Q.31
Catalyst is a substance which
Increases the rate of the reaction
Decreases the rate of reaction
Has no action on the rate of the reaction
None of these
Q.32
The gas used for filling weather balloons is
Helium
Hydrogen
Air
Nitrogen
Q.33
The most abundant element is
Calcium
Silicon
Oxygen
Nitrogen
Q.34
A mixture of water and alcohol can be separated by
Filtration
Evaporation
Decantation
Distillation
Q.35
The property of hydrogen which distinguishes it from alkali metals is
Its electropositive character
Its affinity for non-metal
Its reducing character
Its non-metallic character
Q.36
Which one is the naturally occuring heaviest element?
Mercury
Thorium
Uranium
Protactinium
Q.37
Which of the following will replace hydrogen from acids to form salts ?
S
Na
Ag
P
Q.38
The most abundant element by number in the living system is :
Nitrogen
Hydrogen
Oxygen
Carbon
Q.39
Select the one which is not a mixture :
Air
Gasoline
LPG
Distilled water
Q.40
The hottest part of the gas flame is known as
Blue zone
Non-luminous zone
Luminous zone
Dark zone
Q.41
Which of the following contains high content of lead?
Coal
Cooking gas
High octane fuel
Low octane fuel
Q.42
Which one of the following is not coal variety?
Lignite
Bituminous
Dolomite
Peat
Q.43
Which of the following is used to increase the anti-knocking property of petrol ?
Tetramethyl lead
Tetraethyl lead
Trimethyl lead
Triethyl lead
Q.44
The chief source of naphthalene is
Coal-tar
Diesel
Charcoal
Camphor
Q.45
Except mercury which is the other metal that is liquid at standard conditions for temperature and pressure?
Lead
Bromine
Barium
Magnesium
Q.46
Cooking gas is a mixture of
Methane and ethylene
Carbon dioxide and oxygen
Butane and propane
Carbon monoxide and carbon dioxide
Q.47
Indane gas is mixture of
Butane and hydrogen
Butane and oxygen
Butane and propane
Methane and oxygen
Q.48
Iodine can be separated from a mixture of Iodine and Potassium Chloride by
Sedimentation
Filtration
Sublimation
Distillation
Q.49
Which one of the following is known as the 'brown coal'?
Anthracite
Bituminous
Coke
Lignite
Q.50
Chemical name of bleaching powder is :
Calcium chlorate
Calcium hypochlorite
Calcium chloro hypochlorite
Calcium bi chloride
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