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Oxygen
Hydrogen sulphide
Carbon dioxide
Nitrogen
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
Which of the gas is not known as green house gas ?
Bromine is a