A sample of any of the following substances disappears after sometime when exposed to air like camphor, naphthalene or dry ice. This phenomenon is called :

Consider the following statements about mixture : 1. A substance can be separated into other kinds of matter by any physical process. 2. Dissolved sodium chloride can be separated from water by the p…

Consider the following statements: 1. Crystallization is the process of deriving crystals of pure substance from their solution. 2. A bonding between constituent atoms oг molecules takes place during…

Which one of the following apparatus is used for separating benzene and water mixture ?

Consider the following statements: 1. Addition of salt to pure water increase the boiling point of water and decreases the freezing point of water. 2. When methyl alcohol is added to water boiling po…

Which one of the following methods can be used to separate anthracene from a mixture of salt and anthracene ?