Q. Which one of the following metals is used to galvanise iron ?
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Q. Which of the following is a natural polymer?
Q. The oxidation number of Cr in K2Cr2O7 is
Q. The substance most commonly used as a food preservative is
Q. The substance that causes the worst air polution is
Q. Which among the given is used as anaesthetics -
Q. The three elements most needed in common fertilisers are:
Q. The enzymes popularly used in organic synthesis are
Q. Acid rain is caused due to pollution of atmosphere by
Q. The isotopes of chlorine with mass number 35 and 37 exist in the ratio of
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