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Given below is the sketch of a plant for carrying out a process.

(i) Name the process occurring in the above plant.
(ii) To which container does the net flow of solvent take place?
(iii) Name one SPM which can be used in this plant.
(iv) Give one potential use of the plant.


Answer:

(i) Reverse osmosis.
(ii) Pure water is forced out of the solution to pass through the pores of the membrane in the opposite direction.
(iii) Parchment or cellophone.
(iv) This process is used in desalination to get salt-free water from sea water.

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Give one example each of miscible liquid pairs showing positive and negative deviatins from Raoult’s law. Give one reason for such deviations.

Explain why freezing point of a solvent is lowered on dissolving a non-volatile solute into it? Give an important application of the phenomenon of depression in freezing point.

What is a semi-permeable membrane?

Methanol is soluble in water but insoluble in octane. Explain briefly.

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