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Q. When a solution of silver nitrate is added to a salt solution, a curd-like substance is produced. Which reaction is this?
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Q. The metal generally mixed with gold while making ornaments is
Q. Chemical formula of washing soda is
Q. The process of improving the quality of rubber by heating it with sulphur is called
Q. Which of the following has low density and low melting point ?
Q. Brass gets discoloured in air because of the presence of which of the following gases in air?
Q. Higher concentration of nitrogen dioxide in atmosphere air causes
Q. The metallurgical process in which a metal is obtained in a fused state is called
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