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Which of the following is in liquid form at room temperature ?
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Pollination by birds is called
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The Panda belongs to the same family as that of
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The intencity of Earthquakes is measured on
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In an atomic nucleus, neutrons and protons are held together by
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The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
D. Increased deposition of deep-sea sediments
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Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere in future?
B. Depletion of earth's ozone layer
D. Dust clouds from valcanoes
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Which of the following is commonly called a polyamide ?
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The smallest functional and structural unit of kidney is called as
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Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous glass called
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Which of the following elements is obtained from sea weeds ?
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Polythene is industrially prepared by the polymerisation of
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The metallic constituents of hard water are
A. Calcium, magnesium and iron
B. Magnesium, Calcium and tin
C. Magnesium, tin and iron
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The metal used in storage batteries
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Which of the following elements is non-radioactive?
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What is the unit for measuring the pitch or frequency of sound ?
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The oxide of Nitrogen used in medicine as anaesthetic is
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The recent atomic weight scale is based on
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Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
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The type of glass used in making prisms and lenses is
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One fathom is equal to
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The solar eclipse occurs when
A. the sun comes in between the moon and the earth
B. the moon comes in between the sun and the earth
C. the earth comes in the between the sun and the moon
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Apparatus invented by Archimedes is :
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Bromine is
C. A highly inflammable gas
D. colourless gas insoluble in water
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Brass gets discoloured in air due to the presence of which gas in air
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Which of the following is the lightest metal ?
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Which of the following parts of the sun is easily visible only during a total solar eclipse?
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The major ingredient of leather is
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The marine animal called dugong which is vulnerable to extinction is a/an
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The most important ore of Aluminium is