1.

    The observed freezing point depression of a 0.01 m aqueous solution of a weak acid HA is 0.0205 °C. If the KfK_f of water is 1.86 K kg/mol, which expression correctly calculates the percent ionization of the weak acid?

    A

    (0.0205/1.86/0.01)1(21)imes100 \frac{(0.0205/1.86/0.01) - 1}{(2-1)} imes 100

    B

    (1.86imes0.01/0.0205)1(21)imes100 \frac{(1.86 imes 0.01/0.0205) - 1}{(2-1)} imes 100

    C

    (0.0205/1.86/0.01)(21)imes100 \frac{(0.0205/1.86/0.01)}{(2-1)} imes 100

    D

    (1.86imes0.01imes0.0205)(21)imes100 \frac{(1.86 imes 0.01 imes 0.0205)}{(2-1)} imes 100

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    8.

    In the case of osmosis, solvent molecules move from :

    A

    A region of higher solvent concentration to a region of lower solvent concentration

    B

    A region of lower solvent concentration to a region of higher solvent concentration

    C

    A region of higher solute concentration to a region of lower solute concentration

    D

    A region of equal solute concentration to another region of equal solute concentration

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    9.

    During osmosis, flow of water through a semipermeable membrane is :

    A

    From both sides of semipermeable membrane with unequal flow rates

    B

    From solution having lower concentration only

    C

    From solution having higher concentration only

    D

    From both sides of semipermeable membrane with equal flow rates

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