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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
Which of the gas is not known as green house gas ?
Bromine is a
The hardest substance available on earth is
Tetraethyl lead is used as
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing