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Q. The hardened material available on earth is
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Q. Blue litmus paper is converted into red in solution of _______
Q. How many neutrons does iron have?
Q. Dry distillation of calcium formate gives
Q. The chemical name of vitamin C is
Q. In photography, the compound of nitrogen used is
Q. The formula of lithium nitride is
Q. The charge on position is equal to the charge on
Q. The mineral containing both magnesium and calcium is
Q. The most abundant rare gas in the atmosphere is
Q. Which one of the following is not required for the formation of photochemical smog?
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