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Q. Blue-green algae are included in the group
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Q. Who among the following defined the law of gravitation
Q. An inert gas mixed with oxygen given to patients suffering from restricted breathing is
Q. Water is used in hot water bags as
Q. Why is weightlessness experienced while orbiting the earth in space ships?
Q. The threshold frequency is the frequency below which–
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Q. Which one of the following is not the unit of energy
Q. Permanent hardness of water may be removed by the addition of
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