The tree which sends down roots from its branches to the soil is known as:
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Electric bulb filament is made of
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Brass gets discoloured in air because of the presence of which of the following gases in air?
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Which of the following is a non metal that remains liquid at room temperature?
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Chlorophyll is a naturally occurring chelate compound in which central metal is
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Which of the following is used in pencils?
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Which of the following metals forms an amalgam with other metals?
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Chemical formula for water is
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The gas usually filled in the electric bulb is
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Washing soda is the common name for
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Quartz crystals normally used in quartz clocks etc. is chemically
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Which of the gas is not known as green house gas?
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Bromine is a
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The hardest substance available on earth is
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The variety of coal in which the deposit contains recognizable traces of the original plant material is
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Tetraethyl lead is used as
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Which of the following is used as a lubricant?
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The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
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The gases used in different types of welding would include
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The property of a substance to absorb moisture from the air on exposure is called
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