Related Questions

    1.

    For an ideal solution of benzene and toluene, which of the following is true?

    A

    ΔHmix>0\Delta H_{mix} > 0 and ΔVmix>0\Delta V_{mix} > 0

    B

    ΔHmix=0\Delta H_{mix} = 0 and ΔVmix=0\Delta V_{mix} = 0

    C

    ΔHmix<0\Delta H_{mix} < 0 and ΔVmix<0\Delta V_{mix} < 0

    D

    ΔHmix>0\Delta H_{mix} > 0 and ΔVmix<0\Delta V_{mix} < 0

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    2.

    Lowering of vapour pressure is highest for

    A

    0.1  M  BaCl20.1\;{\rm{M }}\;{\rm{BaC}}{{\rm{l}}_2}

    B

    0.1 M glucose

    C

    0.1  M  MgSO40.1\;{\rm{M }}\;{\rm{MgS}}{{\rm{O}}_4}

    D

    Urea

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    6.

    If P0  and  Ps{{P_0}\;and\;{P_s}} are the vapour pressure of solvent and solution respectively and N1  andN2{{N_1}\;and\,{N_2}} are the mole of solute and solvent then :

    A

    (P0Ps)/P0=N1/(N1+N2)\left( {{P_0} - {P_s}} \right)/{P_0} = {N_1}/\left( {{N_1} + {N_2}} \right)

    B

    (P0Ps)/Ps=N1/N2\left( {{P_0} - {P_s}} \right)/{P_s} = {N_1}/{N_2}

    C

    Ps=P0.N2/(N1+N2){P_s} = {P_0}.{N_2}/\left( {{N_1} + {N_2}} \right)

    D

    All of the above

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    7.

    Which of the following is incorrect?

    A

    Relative lowering of vapour pressure is independent of the solute and the solvent.

    B

    The relative lowering of vapour pressure is a colligative property.

    C

    Vapour pressure of a solution is lower than the vapour pressure of the solvent.

    D

    The relative lowering of vapour pressure is directly proportional to the original pressure.

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    8.

    Raoult's law is applicable to:

    A

    Volatile solute in a volatile solvent

    B

    Non-volatile solute in a volatile solvent

    C

    Volatile solute in a non-volatile solvent

    D

    Non-volatile solute in a non-volatile solvent

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    9.

    When the vapour pressure of solutions of two liquids are less than those expected from ideal solutions, they are said to show :

    A

    Positive deviations from ideal behaviour

    B

    Negative deviations from ideal behaviour

    C

    Positive deviations for lower concentrations and negative deviations for higher concentration

    D

    None of the above

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