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Q. The method that cannot be used for removing permanent hardness of water is
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Q. The most abundant element in the earth's atmosphere is
Q. Mark the compound which posses Ionic, Covalent and Co–ordinate bond:
Q. Which of the following is used as a lubricant?
Q. A current loop in a magnetic field :
Q. The blue colour of the water in the sea is due to-
Q. Which among the given is used to iodise common salf -
Q. Carbon, diamond and graphite are together called:
Q. Which among the given cannot be purified by sublimation?
Q. Which among the following blood vessels has the smallest diameter?
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