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Q. Which of the following elements does not spread pollution?
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Q. The element silicon is present in
Q. The metal that is usually extracted from sea water is
Q. Iodine can be separated from a mixture of Iodine and Potassium Chloride by
Q. A traditional 'battery' contains which of the following chemicals?
Q. An element found in all organic compounds is
Q. Fixation of nitrogen implies
Q. The metals commonly used for electroplating are
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