Q. The charcoal used to decolourise brown sugar solution is
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Q. Acid rain is caused due to pollution of atmosphere by
Q. The metal used to recover copper from a solution of copper sulphate is
Q. The number of d-electrons in Fe2+ (Z = 26) is not equal to that of
Q. Name the gas used in preparation of bleaching powder
Q. Which among the following element is an essential constituent of acids?
Q. In the human body, the most abundant element is
Q. The process of improving the quality of rubber by heating it with sulphur is called
Q. The inexpensive and commonly used variety of glass is called soda glass. It is called so because
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