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Quiz 21
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Q.1
Galvanised iron is made by coating iron with
Zinc
Nickel
Chromium
Sulphur
Q.2
The chemical used for cloud seeding for artificial rains is
Silver Nitrate
Potassium Bromide
Silver Iodide
Potassium Nitrate
Q.3
The “King of Metals” is :
Gold
Silver
Iron
Aluminium
Q.4
Among the following, which is always found in free-state in nature?
Gold
Silver
Sodium
Copper
Q.5
Chemically ‘Quick Silver' is known as
Mercury
Silver
Aluminium
Copper
Q.6
Glycol is added to aviation gasoline because it
Reduces evaporation of petrol
Increases efficiency of petrol
Prevents freezing of petrol
Reduces consumption of petrol
Q.7
Of the following commonly used materials, the one that is not an alloy is
Steel
Brass
Bronze
Copper
Q.8
Which one of the following minerals is found in pure form?
Iron
Copper
Bauxite
Manganese
Q.9
Steel contains
0.1 – 5% carbon
5 – 10% carbon
More than 10% carbon
No carbon
Q.10
Slag is a name given for
Molten iron
Molten sand
Molten alumina
Molten calcium silicate
Q.11
Solder is an alloy of
Lead, zinc
Copper, lead
Tin, lead
Sodium, lead
Q.12
The chemical that is used to ripen mangoes is
Calcium sulphide
Calcium carbide
Calcium carbonate
Calcium chloride
Q.13
Which of the following is used as anesthetic ?
NH
3
N2O
NO
2
N
2
O
Q.14
Which of the following metals is used in Space Crafts to withstand high temperatures ?
Fe
Ti
Ni
Pb
Q.15
Philosopher’s Wool is
Zinc carbonate
Zinc sulphate
Zinc oxide
Zinc blende
Q.16
Which of the following metals has least melting point ?
Gold
Silver
Mercury
Copper
Q.17
The weight of 6.023 × 10
23
atoms of carbon is
12 gms
120 gms
1.2 gms
0.12 gms
Q.18
Which is the heaviest metal among the following?
Gold
Silver
Iron
Copper
Q.19
The manufacture of iron from iron ore involves the process of
Oxidation
Reduction
Fractional distillation
Electrolysis
Q.20
The manufacturing of iron from iron ore involves the process of
Oxidation
Reduction
Electrolysis
Fractional distillation
Q.21
Synthetic detergents are prepared from
Potassium salts of higher fatty-acids
Sodium salts of higher fattyacids
Hydrocarbons of petroleum
Glycerides
Q.22
Stains of rust on clothes can be removed by :
Oxalic acid
Petrol
Alcohol
H
2
O
2
Q.23
Synthetic detergents are made from
Sodium stearate
Sodium salt of benzene sulphonic acid
Sodium salt of benzene carboxylic acid
Sodium palmitate
Q.24
What is the principal ore of aluminium ?
Dolomite
Copper
Lignite
Bauxite
Q.25
Freon used as refrigerant is chemically
Chlorinated hydrocarbon
Fluorinated hydrocarbon
Chlorofluoro hydrocarbon
Fluorinated aromatic compound
Q.26
Which is the purest commercial form of iron ?
Pig iron
Steel
Stainless steel
Wrought iron
Q.27
Solder is an alloy of
Tin and lead
Tin and copper
Tin, copper and zinc
Tin, lead and zinc
Q.28
Exposure to mixtures of chemicals are greater than expected on the basis of effects of exposure to each chemical individually. This is known as
Additives
Antagonism
Synergism
Independent
Q.29
Which of the following is used to remove ink and rust stains on cloth?
Oxalic acid
Alcohol
Ether
Kerosene oil
Q.30
Aspirin is chemically known as
Methyl salicylate
Hydroxysalicylate
Acetylsalicylic acid
Alkylsalicylic acid
Q.31
Phosphorus is kept in water because
Its ignition temperature is very high
Its ignition temperature is very low
Its critical temperature is high
Its critical temperature is low
Q.32
If there is one million Mg
2+
ions in MgCl
2
, how many chloride ions are there?
Two million
One million
Half a million
Ten million
Q.33
What is the mass percentage of carbon in carbon dioxide (CO
2
)?
15.8 %
20.1 %
27.3 %
32.3 %
Q.34
Detergents are
Sodium salts of fatty acids
Sodium salts of sulphonic acids
Sodium salt of benzoic acid
None of the above
Q.35
Which among the following is found in chlorophyll ?
Ca
2+
Mg
2+
Fe
2+
Al
3+
Q.36
Aspirin is
Methoxy benzoic acid
Methyl Salicilate
Acetyl Salicilic acid
Phenyl Salicilate
Q.37
The important ore of aluminium is
Bauxite
Cryolite
Fluorspar
Haematite
Q.38
What is a mixture of potassium nitrate, powdered charcoal and sulphur called?
Glass
Cement
Paint
Gun powder
Q.39
Saccharin is made up of
Toluene
Phenol
Propane
Butane
Q.40
One of the constituents of tear gas is
Ethane
Ethanol
Ether
Chloropicrin
Q.41
The element used for making solar cells is
Magnesium
Sodium
Calcium
Silicon
Q.42
Commonly used antiseptic 'Dettol' is a mixture of
O-chlorophenoxylenol + terepineol
O-cresol + terepineol
Phenol + terepineol
Chloroxylenol + terepineol
Q.43
The gas used in the artificial ripening of fruits is
Acetylene
Methane
Ethane
Butane
Q.44
The element used in the manufacture of safety matches is
Phosphorous
Magnesium
Silicon
Sulphur
Q.45
Burning pyrites ore gives out
Carbon dioxide gas
Sulphur dioxide gas
Nitrogen dioxide gas
Nitric oxide gas
Q.46
The gas used for artificial fruit ripening of green fruit is
Ethylene
Acetylene
Ethane
Methane
Q.47
Which one of the following vegetable oils is used in the manufacture of paints?
Palm oil
Sunflower oil
Linseed oil
Cottonseed oil
Q.48
The most abundant metal in the Earth’s crust is
Zinc
Copper
Aluminium
Iron
Q.49
Solder metal is an alloy of
Lead and tin
Lead and antimony
Copper and zinc
Copper and tin
Q.50
KMnO
4
can be used as a/an
Insecticide
Fertiliser
Pesticide
Disinfectant
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