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Q. The monomer of polythene is
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Q. Dry powder fire extinguishers contain
Q. The metal that does not give H2 on treatment with dilute HCl is
Q. Which of the following pollutants is main product of automobile exhaust ?
Q. The mineral containing both magnesium and calcium is
Q. Roxarsone, an arsenic containing nitrophenol is used as
Q. Allugel tablets used to reduce acidity contain
Q. The chief constituent of gobar gas is
Q. If lime water is kept in the air, it turns milky due to presence of :
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