NEET UG CHEMISTRY MCQ: SOLUTIONS

1 Medium

1 of 1

Understanding +4 | -1

Consider the following statements.

(i) On adding methyl alcohol to water, boiling point of water increases

(ii) When

{NaCl}

is added to water, depression in freezing point is observed

(iii) Diffusion of solution occurs from a region of its high concentration to a region of its low concentration

Choose the correct options

View answer and explanation

Correct option: C

(ii) and (iii)

Option C ((ii) and (iii)) is correct because adding NaCl to water lowers the freezing point, and diffusion occurs from high to low concentration.

More Questions from SOLUTIONS

Practice All Chapter MCQs →

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

and

B

are 400 and 600 mmHg, respectively at 298 K. On mixing the two liquids, the sum of their initial volumes is equal to the volume of the final mixture. The mole fraction of liquid

B

is 0.5 in the mixture. The vapour pressure of the final solution, the mole fractions of components

A

and

B

in vapour phase, respectively are What is molecular weight of a substance whose 7.0% by mass solution in water freezes at

--{0.93^0}C

{K_f}

for water is

1.86\mathrm{ }K\mathrm{ }kg\mathrm{ }mo{l^{ - 1}}

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