Q.1
Galvanised iron is made by coating iron with
Q.2
The chemical used for cloud seeding for artificial rains is
Q.3
The “King of Metals” is :
Q.4
Among the following, which is always found in free-state in nature?
Q.5
Chemically ‘Quick Silver' is known as
Q.6
Glycol is added to aviation gasoline because it
Q.7
Of the following commonly used materials, the one that is not an alloy is
Q.8
Which one of the following minerals is found in pure form?
Q.9
Steel contains
Q.10
Slag is a name given for
Q.11
Solder is an alloy of
Q.12
The chemical that is used to ripen mangoes is
Q.13
Which of the following is used as anesthetic ?
Q.14
Which of the following metals is used in Space Crafts to withstand high temperatures ?
Q.15
Philosopher’s Wool is
Q.16
Which of the following metals has least melting point ?
Q.17
The weight of 6.023 × 1023 atoms of carbon is
Q.18
Which is the heaviest metal among the following?
Q.19
The manufacture of iron from iron ore involves the process of
Q.20
The manufacturing of iron from iron ore involves the process of
Q.21
Synthetic detergents are prepared from
Q.22
Stains of rust on clothes can be removed by :
Q.23
Synthetic detergents are made from
Q.24
What is the principal ore of aluminium ?
Q.25
Freon used as refrigerant is chemically
Q.26
Which is the purest commercial form of iron ?
Q.27
Solder is an alloy of
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
Q.29
Which of the following is used to remove ink and rust stains on cloth?
Q.30
Aspirin is chemically known as
Q.31
Phosphorus is kept in water because
Q.32
If there is one million Mg2+ ions in MgCl2, how many chloride ions are there?
Q.33
What is the mass percentage of carbon in carbon dioxide (CO2)?
Q.34
Detergents are
Q.35
Which among the following is found in chlorophyll ?
Q.36
Aspirin is
Q.37
The important ore of aluminium is
Q.38
What is a mixture of potassium nitrate, powdered charcoal and sulphur called?
Q.39
Saccharin is made up of
Q.40
One of the constituents of tear gas is
Q.41
The element used for making solar cells is
Q.42
Commonly used antiseptic 'Dettol' is a mixture of
Q.43
The gas used in the artificial ripening of fruits is
Q.44
The element used in the manufacture of safety matches is
Q.45
Burning pyrites ore gives out
Q.46
The gas used for artificial fruit ripening of green fruit is
Q.47
Which one of the following vegetable oils is used in the manufacture of paints?
Q.48
The most abundant metal in the Earth’s crust is
Q.49
Solder metal is an alloy of
Q.50
KMnO4 can be used as a/an
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