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NEET UG CHEMISTRY MCQ: SOLUTIONS

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Lowering in vapour pressure is the highest for:

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Correct option: D

0.1\;m\;\mathrm{BaC}{\mathrm{l}_2}

Option D (

0.1\;m\;\mathrm{BaC}{\mathrm{l}_2}

) is correct because it has the highest van't Hoff factor, leading to the greatest lowering in vapor pressure.

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Consider the solution of ethanol. In it Assertion: Isotonic solutions don't show net phenomenon of osmosis.

Reason: Isotonic solutions have equal osmotic pressure at constant temperature. 0.2 molal aqueous solution of a monobasic acid is 60% ionised. If Kb for water is

0.52\,K\,kg\,mo{l^{ - 1}}

then the boiling point of the solution will be The vapour pressures of pure liquids

A

B

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--{0.93^0}C

{K_f}

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A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of 290 mm at 300 K. the vapour pressure of propyl alcohol is 200 mm. If the mole fraction of ethyl alcohol is 0.6, its vapour pressure (in mm) at the same temperature will be