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On a clean glass plate a drop of water spread to form a thin layer whereas a drop of mercury remains almost spherical because
Brass gets discoloured in air because of the presence of which of the following gases in air ?
Which is a non metal that remains liquid at room temperature ?
Chlorophyll is a naturally occurring chelate compound in which central metal is
Which of the following is used in pencils ?
Which of the following metals forms an amalgam with other metals ?
Chemical formula for water is
The gas usually filled in the electric bulb is
Washing soda is the common name for
Quartz crystals normally used in quartz clocks etc. is chemically
