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 Multiple Choice QuestionsMultiple Choice Questions

601.

The freezing point of water is depressed by 0.37°C in a 0.01 molal NaCl solution. The freezing point of 0.02 molal solution of urea is depressed by

  • 0.37°C

  • 0.74°C

  • 0.185°C

  • 0°C


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602.

Chloroform, when kept open, is oxidised to :

  • CO2

  • COCl2

  • CO2, Cl2

  • None of these


B.

COCl2

Chloroform is oxidised to a poisonous gas, phosgene (COCl2) by atmospheric oxidation.

CHCl3 + O →  COCl2 + HCl


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603.

Blood cells will remain as such in:

  • hypertonic solution

  • hypotonic solution

  • isotonic solution

  • none of the above


604.

The mixture that forms maximum boiling azeotrope is:

  • Ethanol + Water

  • Acetone + Carbon disulphide

  • Heptane + Octane

  • Water + Nitric acid


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605.

For an ideal solution, the correct option is :

  • Δmix V ≠  0 at constant T and P

  • Δmix H =  0 at constant T and P

  • Δmix G =  0 at constant T and P

  • Δmix S = 0 at constant T and P


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