Liquid Solution · Chemistry · AP EAPCET
MCQ (Single Correct Answer)
Two statements are given below
Statements I : Liquids $A$ and $B$ form a non-ideal solution with positive deviation. The interactions between $A$ and $B$ are weaker than $A-A$ and $B-B$ interactions.
Statements II : For an ideal solution $\Delta_{\text {mix }} H=0$; $\Delta_{\text {mix }} V=0$
The correct answer is
At 290 K , a vessel (I) contains equal moles of three liquids $(A, B, C)$. The boiling points of $A, B$ and $C$ are $350 \mathrm{~K}, 373 \mathrm{~K}$ and 308 K respectively. Vessel (I) is heated to 300 K and vapours were collected into vessel (II). Identify the correct statements. (Assume vessel (I) contains liquids and vapours and vessel (II)contains only vapours)
(I) Vessel - I is rich in liquid $B$
(II) Vessel - II is rich in vapour of $C$
(III) The vapour pressures of $A, B, C$ in vessel (I) at 290 K follows the order $C>A>B$
At $300 \mathrm{~K}, 6 \mathrm{~g}$ of urea was dissolved in 500 mL of water. What is the osmotic pressure (in atm) of resultant solution?
$$ \begin{aligned} & \left(R=0.082 \mathrm{~L}^{\operatorname{atm~K}}{ }^{-1} \mathrm{~mol}^{-1}\right) \\ & (\mathrm{C}=12 ; \mathrm{N}=14 ; \mathrm{O}=16 ; \mathrm{H}=1) \end{aligned} $$
Benzoic acid undergoes dimerisation in benzene. $x \mathrm{~g}$ of benzoic acid (molar mass $122 \mathrm{~g} \mathrm{~mol}^{-1}$ ) is dissolved in 49 g of benzene. The depression in freezing point is 1.12 K . If degree of association of acid is $88 \%$. What is the value of $x$ ? $\left(K_f\right.$ for benzene $\left.=4.9 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right)$
At $T(\mathrm{~K})$ two liquids $A$ and $B$ form an ideal solution. The vapour pressures of pure liquid $A$ and $B$ at that temperature are 400 and 600 mm Hg respectively, If the mole fraction of liquid $B$ is 0.3 in the mixture, the mole fractions of $A$ and $B$ in vapour phase respectively are
The following graph is obtained for vapour pressure (in atm) (on $Y$-axis) and $T$ (in K) (on $X$-axis) for aqueous urea solution and water. What is the boiling point (in K) of urea solution?
(Atmospheric pressure $=1 \mathrm{~atm}$ )
Given below are two statements.
Statement I : Liquids $A$ and $B$ form a non-ideal solution with negative deviation. The interactions between $A$ and $B$ are weaker than $A-A$ and $B-B$ interactions.
Statement II : In reverse osmosis, the applied pressure must be higher than the osmotic pressure of solution
The correct answer is
A non- volatile solute is dissolved in water. The $\Delta T_{\mathrm{b}}$ of resultant solution is 0.052 K . What is the freezing point of the solution ( in K )?
( $K_b$ of water $=0.52 \mathrm{~K} \mathrm{kgmol}^{-1}$,
$K_f$ of water $=1.86 \mathrm{~K} \mathrm{kgmol}^{-1}$,
freezing point of water $=273 \mathrm{~K}$ )
The osmotic pressure of sea water is 1.05 atm . Four experiments were carried as shown in table. In which of the following experiments, pure water can be obtained in part-II of vessel.
$$
\begin{aligned}
&\text { Table }\\
&\begin{array}{ccc}
\hline \begin{array}{c}
\text { Expt. } \\
\text { No }
\end{array} & \begin{array}{c}
\text { Pressure applied in } \\
\text { part-1 of vessel }
\end{array} & \begin{array}{c}
\text { Pressure applied in } \\
\text { part-II of vessel }
\end{array} \\
\hline \text { I. } & 10 \mathrm{~atm} & - \\
\hline \text { II. } & - & 10 \mathrm{~atm} \\
\hline \text { III. } & 15 \mathrm{~atm} & - \\
\hline \text { IV. } & - & 15 \mathrm{~atm}
\end{array}
\end{aligned}
$$0.05 mole of a non-volatile solute is dissolved in 500 g of water. What is the depression in freezing point of resultant solution?
$$\left(K_f\left(\mathrm{H}_2 \mathrm{O}\right)=1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right)$$
Which of the following form an ideal solution?
I. Chloroethane and bromoethane
II. Benzene and toluene
III. $$n$$-hexane and $$n$$-heptane
IV. Phenol and aniline
A solution containing 6.0 g of urea is isotonic with a solution containing 10 g of a non-electrolytic solute $$X$$. The molar mass of X (in g $$\mathrm{mol}^{-1}$$) is
$$x \%(w / V)$$ solution of urea is isotonic with $$4 \%$$ $$(w / V)$$ solution of a non-volatile solute of molar mass $$120 \mathrm{~g} \mathrm{~mol}^{-1}$$. The value of $$x$$ is
At $$T(\mathrm{~K}) \times \mathrm{g}$$ of a non-volatile solid (molar mass $$78 \mathrm{~g} \mathrm{~mol}^{-1}$$) when added to 0.5 kg water, lowered its freezing point by $$1.0^{\circ} \mathrm{C}$$. What is $$x$$ (in g)? ($$K_f$$ of water at $$T(\mathrm{~K})=1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$$)
Assertion (A) Blood cells collapse when suspended in saline water.
Reason (R) Cell membrane dissolves in saline water.
If the $$K_{\mathrm{H}}$$ values for $$\operatorname{Ar}(g), \mathrm{CO}_2(g), \mathrm{HCHO}(g)$$ and $$\mathrm{CH}_4(\mathrm{~g})$$ respectively are $$40.39,1.67, 1.83 \times 10^{-5}$$ and $$0.413$$ , then identify the correct increasing order of their solubilities.
If 500 mL of CaCl$$_2$$ solution contains 3.01 $$\times$$ 10$$^{22}$$ chloride ions, molarity of the solution will be
Which condition is not satisfied by an ideal solution?
A solution of urea (molar mass $$60 \mathrm{~g} \mathrm{~mol}^{-1}$$ ) boils at $$100.20^{\circ} \mathrm{C}$$ at the atmospheric pressure, if $$K_f$$ and $$K_b$$ for water are 1.86 and $$0.512 \mathrm{~K}$$ $$\mathrm{kg} \mathrm{mol}^{-1}$$ respectively. The freezing point of the solution will be
When difference in boiling points of two liquids is too small, then the separation is carried out by
Which of the following will form an ideal solution?
The molal elevation constant is the ratio of elevation in boiling point to