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Impurities settled at the bottom when muddy water was kept overnight in a bucket.The clear water was then poured off form the top. The process of separation used in this example is called .......... .

Fill up the blanks: When milk, cooled after boiling , is poured onto a piece of cloth the cream ( malai) is left behind on it .This process of separating cream from milk is an example of ..... .

Fill up the blanks: Salt is obtained from sea water by the process of ........ .

Fill in the blanks When crops in the field are given water, it is called……….

Fill in the blanks with the appropriate answers: The process of water seepage into the ground is called ________.

Fill in the blanks: When a cell is placed in hypotonic soluion,water moves into the cell,this flow is called............. .

Lowering in vapour pressure is determined by Ostwald and Walker dynamic methed. It is based on the prinicipal , that when air is allowed to pass through a solvent or solution, it takes up solventvapour with it to get itself saturated at that temperature I and II are weighted separately before and after passing dry air. Loss in mass of each set, gives the lowing of vapour pressure. The temperature of air, the solution and the solvent is kept constant. Dry air was passed thorough 9.24 g of solute in 108 g of water and then through pure water. The loss in mass of solution was 3.2 g and that of pure water 0.08 g . The molecular mass (g/mol) of solute is nearly :