What is the role of ultraviolet (UV) radiation in the water purification systems? 1. It inactivates/kills the harmful microorganisms in water. 2. It removes all the undesirable odours from the water. 3. It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water. Which of the statements given above is/are correct?

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…

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. 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…

Match List I with List-II and select the correct answer using the code given below the Lists: List I (Process) A. Separation of acetone and water from their mixture B. Separation of water and kerosen…

Which one of the following processes is NOT useful for purification of solid impurities?