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Quiz 4
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Q.1
The main chemical constituent of clay is
silicon oxide
aluminium borosilicate
zeolites
aluminium silicate
Q.2
The metal does not give H
2
on treatment with dilute HCL is
Zn
Fe
Ag
Ca
Q.3
The number of electrons presents in H
+
is
zero
one
two
three
Q.4
Which one amongst the following is not a Green House gas?
Nitrogen
Carbon dioxide
Carbon Monoxide
Chloro fluoro carbons
Q.5
The gas used for artificial ripening of green fruit is
ethylene
ethane
carbon dioxide
acetylene
Q.6
Zone refining is used for the purification of
Au
Ge
Ag
Cu
Q.7
The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in
1.8 gram of H
2
O
12 moles of KMnO
4
0.6N H
2
SO
4
4.6 gram of C
2
H
5
OH
Q.8
The mineral containing both magnesium and calcium is
magnesite
calcite
carnallite
dolomite
Q.9
The number of g-molecule of oxygen in 6.02 x 10
24
CO molecules is
1 gram of molecule
0.5 gram of molecule
5 gram of molecule
10 gram of molecule
Q.10
The most extensive, commercially useful source of thorium as monazite sand occurs in India at
Orissa coast
Travancore coast
West Bengal coast
Gujarat coast
Q.11
The hottest part of the gas flame is known as
luminous zone
dark zone
blue zone
non-luminous zone
Q.12
The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is
cineole
engenol
geraniol
limonene
Q.13
The 'solid waste' is also known as
Sedge
Toxic waste
Sludge
Scrubber
Q.14
The molecule which has the highest percentage of ionic character among the following is
HI
HF
HCI
HBr
Q.15
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2
nd
orbit to 3
rd
orbit is
5x/36
5x
7.2 x
x/6
Q.16
The main active constituent of tea and coffee is
nicotine
chlorophyll
caffeine
aspirin
Q.17
The high reactivity of fluorine is due to
its high electro negativity
small size of fluorine atom
availability of d-orbitals
strong F - F bond
Q.18
The maximum number of isomers for an alkene with molecular formula C
4
H
8
is
5
4
2
3
Q.19
Galvanization is the :
Deposition of zinc on iron
Deposition of tin on iron
Deposition of copper on iron
Deposition of aluminium on iron
Q.20
A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed?
From brown to blue-black
From brown to orange-red
From blue to pink
From pink to blue-green
Q.21
Rusting of iron takes place due to
Oxidation
Carbonation
Exfoliation
Corrosion
Q.22
When a spoon is to be electroplated with nickel the spoon is
Dipped in a nickel sulphate solution
Made anode and a pure nickel rod, the cathode
Made cathode and a pure nickel red, the anode
Coated with nickel sulphate and dried
Q.23
A non-electronic conductor is
Iron
Gas Carbon
Copper Sulphate
None of these
Q.24
An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a :
Power transmittor
Battery
Uninterrupted power supply (UPS)
Generator
Q.25
The metal used to galvanise iron to protect it from rusting is
Zinc
Chromium
Lead
Antimony
Q.26
Combustion of a candle is a/an
Photochemical reaction
Physical change
Endothermic reaction
Exothermic reaction
Q.27
Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ?
Methane
Ethane
Propane
Butane
Q.28
Conversion of chemical energy into electrical energy occurs in
Atomic bombs
Dynamo
A battery
Electric heaters
Q.29
The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :
Zinc plating
Alloy formation
Vulcanization
Galvanization
Q.30
Which type of fire extinguisher is used for petroleum fire ?
Foam type
Soda acid type
Powder type
None of these
Q.31
Highly toxic gas which causes headache, visual difficulty, paralysis and even death is
CO
2
O
3
CO
All of these
Q.32
The anode of a dry cell is made up of
Iron
Cadmium
Zinc
Lead
Q.33
The metals commonly used for electroplating are
Gold, Sodium and Chromium
Chromium, Copper and Nickel
Nickel, Lead and Chromium
Gold, Sodium and Potassium
Q.34
Which of the following is very reactive and kept in kerosene?
Sodium
Potassium
Iodine
Bromine
Q.35
Which metal does not undergo corrosion due to the formation of oxide layer?
Copper
Iron
Aluminium
Zinc
Q.36
Iron is prevented from rusting by coating with zinc. This process is called as
Galvanisation
Corrosion
Sublimation
Reduction
Q.37
An electric iron has a heating element made of :
Copper
Tungsten
Nichrome
Zinc
Q.38
Candle is a mixture of
Paraffin was and stearic acid
Bees wax and stearic acid
Higher fatty acids and stearic acid
Bees wax and paraffin wax
Q.39
Coal is formed from
Crude oil
Deposit of animal waste
Coke
Compressed and hardened biomass
Q.40
Galvanization of iron is carried out using
Zinc
Tin
Copper
Chromium
Q.41
The working of a dry cell is based on
Decomposition reaction
Spontaneous oxidation-reduction reaction
Combination reaction
Electrolysis
Q.42
Man dies in the atmosphere of CO, because it
Dries up the blood
Combines with O
2
present in the body
Reduces the organic matter of tissues
Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O
2
Q.43
It is dangerous to leave the car engine running in a closed garage, because it may cause serious pollution due to poisoning by emission of
CO
2
CO
Unburnt petrol
SO
2
Q.44
Water gas is the combination of
CO and H
2
CO
2
and H
2
CO and H
2
O
CO
2
and CO
Q.45
The gas that causes suffocation and death when coal or coke is burnt in a closed room is
Methane
Ethane
Carbon monoxide
Carbon dioxide
Q.46
The coating of a thin layer of zinc on steel or iron objects is known as
Hot dipping
Tinning
Galvanising
Electroplating
Q.47
In galvanization, iron is coated with
Copper
Zinc
Tin
Nickel
Q.48
The lustre of the metals is because of
High density, due to closed packing of atoms
High polish
Reflection of light due to the presence of free electrons
Absorption of light due to the presence of cavities
Q.49
The first metal used by a man was
Copper
Silver
Bronze
Brass
Q.50
The Latin word
formica
means ant. The name formic acid is derived from this Latin word because
this acid, in ancient times, was used to eliminate ant-hills
this corrosive acid is secreted by ants to drive away their enemies
this acid was first obtained by the distillation of ants
ants are attracted by the odour of this acid
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