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Q. Which among the following is used to dilute oxygen in the gas cylinders used by divers ?
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Q. Which subatomic particle has a negative charge?
Q. Mendeleev could not assign a correct position to which of the following elements in his table ?
Q. TEL minimise the knocking effect when mixed with petrol, it acts as_
Q. In galvanization, iron is coated with
Q. Fixation of nitrogen implies
Q. Smoke is a colloidal dispersion of a
Q. Which one of the following is highly exothermic?
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