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Q. Percentage of lead in lead pencils is
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Q. Soap is prepared by boiling caustic soda with
Q. The phenomenon which causes mirage is
Q. What happens to a liquid, when the vapour pressure equals the atmospheric pressure -
Q. The atmosphere exerts enormous pressure on us. But we do not feel it because
Q. The energy released when an extra electron is added to a neutral gaseous atom is called
Q. In the Earth, the weight of a body is max. at the
Q. Which of the following is chief source of Napthalene ?
Q. A plant with compound leaves is
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