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Q. One of the constituents of tear gas is
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Q. Vinegar made by fermentation from cane sugar contains
Q. Which of the following has the longest wave length?
Q. The most common cause of pollution of air is
Q. Discovery of the nucleus of an atom was due to the experiment carried out by
Q. Washing soda is the common name for
Q. The polymer obtained by the condensation of hexamethylene diamine and adipic acid is :
Q. An element that does not occur in nature but can be produced artificially is
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