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Impure camphor is purified by
Ozone consists of
The cross section of a chisel is usually
The stones formed in human kidney consist mostly of
Which among the following is homologous to a human arm?
Which of the following metals is in a liquid state at normal room temperature?
A colloidal system in which a liquid is dispersed in a liquid is called
Conduction, is the process of heat transfer in which :
In a barometer, mercury is preferred over water because
Ozone hole refers to
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