Q.1
Chemical formula for water is
Q.2
Light year is a measurement of
Q.3
Amalgams are:
Q.4
What is the unit for measuring the amplitude of a sound?
Q.5
Which of the following is the lightest metal?
Q.6
Which of the following metals remain in liquid for under normal conditions?
Q.7
Reading of a barometer going down is an indication of
Q.8
Decibel is the unit for
Q.9
Potassium Permanganate is used for purifying drinking water, because
Q.10
Which of the following is an element?
Q.11
One fathom is equal to
Q.12
Fathom is the unit of
Q.13
Which metal pollute the air of a big city?
Q.14
Bell metal is an alloy of
Q.15
LPG consists of mainly:
Q.16
The filament of an electric bulb is made of
Q.17
Monazite is an ore of
Q.18
Carbon, diamond and graphite are together called:
Q.19
The group of metals Fe, Co, Ni may best called as:
Q.20
In which of the following activities silicon carbide is used?
Q.21
Water is a good solvent of ionic salts because:
Q.22
Air is a/an:
Q.23
Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?
Q.24
Diamond is an allotropic form of:
Q.25
In fireworks, the green flame is produced because of
Q.26
Which of the following are the ingredients of gun metal?
Q.27
The most important ore of aluminum is
Q.28
Potassium nitrate is used in
Q.29
Permanent hardness of water may be removed by the addition of:
Q.30
Heavy water is:
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