When two liquids $A$ and $B$ are mixed they form an ideal solution. At certain temperature the V.P. of the solution, that contains 3 moles of $A$ and 1 mole of $B$ was found to be $550 \mathrm{~mm}$ of $\mathrm{Hg}$. The vapour pressure of a solution containing 4 moles of $A$ and 1 mole of $B$ was found to be 560 $\mathrm{mm}$ of $\mathrm{Hg}$. The vapour pressure of pure liquid $A$ is

JEE CHEMISTRY MCQ: SOLUTIONS

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Application +4 | -1

When two liquids

A

and

B

are mixed they form an ideal solution. At certain temperature the V.P. of the solution, that contains 3 moles of

A

and 1 mole of

B

was found to be

550 \mathrm{~mm}

\mathrm{Hg}

. The vapour pressure of a solution containing 4 moles of

A

and 1 mole of

B

was found to be 560

\mathrm{mm}

\mathrm{Hg}

. The vapour pressure of pure liquid

A

View answer and explanation

Correct option: D

600 \mathrm{~mm}

Option C (1-phenylpropan-2-ol) is correct because the reaction of 1-phenyl, 2-chloropropane with aqueous KOH results in a substitution reaction, where the chlorine atom is replaced by a hydroxyl group at the same carbon.

More Questions from SOLUTIONS

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An aqueous solution of a solute which neither associates nor dissociates has a freezing point depression of

\mathrm{X}^{\circ} \mathrm{C}.

An equimolal solution of a second salt has a freezing point depression of

3 \mathrm{X}^{\circ} \mathrm{C}.

Assuming

100 \%

dissociation of salt, the second solution could be a salt of formula Read the following statements carefully and choose the correct option

(i) Osmotic pressure is not a colligative property.

(ii) For dilute solutions, osmotic pressure is proportional to the molarity,

{C}

of the solution at a given temperature

T

.

(iii) During osmosis, solvent molecules always flow from higher concentration to lower concentration of solution.

(iv) The osmotic pressure has been found to depend on the concentration of the solution A solution that obeys Raoult’s law is called Equal masses of two aqueous solutions, one of

3.6 \, \mathrm{g}

glucose per

100 \mathrm{~g}

of water and the other of

3.6 \mathrm{~g}

urea per

100 \mathrm{~g}

of water are mixed. If the freezing point of resulting solution is

-x^{\circ} \mathrm{C},

then the value of '

1000 x

' is

\left(K_{\mathrm{f}}\right.

of water

\left.=1.86\right)

Information

I. Semipermeable membrane contains network of submacroscopic holes or pores.

II. Semipermeable membrane appears to be continuous sheets or films.

III. Solvent molecules cannot pass through the holes of semipermeable membrane but solute molecules can pass On the basis of the information given above select the correct option. Assertion (A) : Addition of

\mathrm{HgI}_2

to aqueous solution of

\mathrm{KI}

shows an increase in vapour pressure.

Reason (R) : The number of particles present in solution decreases due to formation of complex

\mathrm{K}_2 \mathrm{HgI}_4