An element which is preserved under water is
White phosphorus undergoes spontaneous combustion when exposed to air. In order to prevent this spontaneous ignition, it is preserved under water.
Brass gets discoloured in air because of the presence of which of the following gases in air ?
Which of the following is a non metal that remains liquid at room temperature ?
Permanent hardness of water is due to the presence of ?
Select the correct statement (s).
Triple point of water corresponds to
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