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………..is used for desalination of brackis...

………..is used for desalination of brackish water.

A

Reverse osmosis

B

Ion-exchange

C

Adsorption

D

Electrodialysis

Text Solution

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The correct Answer is:
A
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Read the given passage and answer the questions : The direction of osmosis can be reversed if a pressure larger than the osmotic pressure is applied to the solution side. That is, now the pure solvent flows out of the solution through the semi permeable membrane. This phenomenon is called reverse osmosis and is of great practical utility. Reverse osmosis is used in the desalination of sea water. When pressure more than the osmotic pressure is applied, pure water is squeezed out of sea water through the membrane. A variety of polymer membranes are available for this purpose. What is meant by reverse osmosis ?

Read the given passage and answer the questions : The direction of osmosis can be reversed if a pressure larger than the osmotic pressure is applied to the solution side. That is, now the pure solvent flows out of the solution through the semi permeable membrane. This phenomenon is called reverse osmosis and is of great practical utility. Reverse osmosis is used in the desalination of sea water. When pressure more than the osmotic pressure is applied, pure water is squeezed out of sea water through the membrane. A variety of polymer membranes are available for this purpose. Give one example of a material used in the preparation of membrane.

Knowledge Check

  • One of the techniques used for desalination of sea water is A. Filtration B. Distillation C. Evaporation D. Condensation

    A
    C
    B
    B
    C
    A
    D
    D

  • Statement-1 : When a cell is placed in hypertonic solution, it shrinks. Statement : 2 Reverse osmosis is used for desalination of water.

    A
    Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1
    B
    Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1
    C
    Statement-1 is True, Statement-2 is False.
    D
    Statement-1 is False, Statement-2 is True.

  • Assertion : Reverse osmosis is used in the desalination of sea water. Reason : When pressure more than osmotic pressure is applied, pure water is squeezed out of the sea water through membrane.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion.
    C
    If assertion is true but reason is false.
    D
    If the assertion and reason both are false.

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    Explore conceptually related problems

    Read the given passage and answer the questions : The direction of osmosis can be reversed if a pressure larger than the osmotic pressure is applied to the solution side. That is, now the pure solvent flows out of the solution through the semi permeable membrane. This phenomenon is called reverse osmosis and is of great practical utility. Reverse osmosis is used in the desalination of sea water. When pressure more than the osmotic pressure is applied, pure water is squeezed out of sea water through the membrane. A variety of polymer membranes are available for this purpose. Give one more example of osmosis in daily use.

    What is desalination?

    1. What are physicochemical techniques for removal of radiobiological pollutants from water? Which will be useful to desalinate brackish water?

    Water is used for

    For carrying reverse osmosis for desalination of water the material used for making semipermeable membrane is

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