Q.1
Which one of the following elements is an example of noble gas ?
Q.2
Which among the following metals provides amphoteric oxide ?
Q.3
The wire of flash bulb is made of:
Q.4
The metal chiefly used for galvanising iron is :
Q.5
Which gas is used as fire extinguisher ?
Q.6
The process which does not evolve CO2 in air is
Q.7
Which one is not a pure form of carbon?
Q.8
Which one is the purest form of carbon?
Q.9
The process of improving the quality of rubber by heating it with sulphur is called
Q.10
The monomer of polythene is
Q.11
The luster of a metal is due to
Q.12
The non-metal found in the liquid state is
Q.13
White phosphorus is generally kept under
Q.14
Which metal is extracted from sea water?
Q.15
The ore which is found in abundance in India is
Q.16
The inherited traits of an organism are controlled by
Q.17
The nuclear particles which are assumed to hold the nucleons together are
Q.18
The main buffer system of the human blood is
Q.19
At room temperature, the metal that remains liquid is:
Q.20
Helium gas is filled in balloons because
Q.21
Impure camphor is purified by
Q.22
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of
Q.23
Identify the metal which is non toxic in nature.
Q.24
The anode in a dry cell consists of
Q.25
Which of the following phenomenon is considered responsible for Global Warming?
Q.26
Which of the following gases is present under pressure in soft drinks?
Q.27
The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is
Q.28
One carat of diamond is equal to
Q.29
Which among the following is liquid non-metal ?
Q.30
Diamonds are glittering and attractive because light incident on them undergoes
Q.31
The rusting of iron is a/an
Q.32
The percentage of Nitrogen in Air is
Q.33
The heat energy produced when the human body metabolises 1 gram of fat is
Q.34
The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is
Q.35
The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is
Q.36
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is
Q.37
Iron filings can be separated from a heterogeneous mixture using the technique of :
Q.38
The metallurgical process in which a metal is obtained in a fused state is called
Q.39
The molecules of which gas have highest speed?
Q.40
Iron rusts quickly in
Q.41
The nucleus of an atom consists of
Q.42
The number of moles of solute present in 1 kg of a solvent is called its
Q.43
If we burn graphite,
Q.44
Lead pencil contains
Q.45
The most malleable metal is
Q.46
Carbon dioxide is
Q.47
Hardest allotrope of carbon is
Q.48
Metal are good conductors, because
Q.49
If lime water is kept in the air, it turns milky due to presence of :
Q.50
Diamond is harder than graphite because of :
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