Liquid Solution · Chemistry · AP EAPCET

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MCQ (Single Correct Answer)

1

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 $C>A>B$

AP EAPCET 2024 - 22th May Evening Shift
2

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?

$$ \begin{aligned} & \left(R=0.082 \mathrm{~L}^{\operatorname{atm~K}}{ }^{-1} \mathrm{~mol}^{-1}\right) \\ & (\mathrm{C}=12 ; \mathrm{N}=14 ; \mathrm{O}=16 ; \mathrm{H}=1) \end{aligned} $$

AP EAPCET 2024 - 22th May Evening Shift
3
In water, which of the following gases has the highest Henry's law constant at 293 K ?
AP EAPCET 2024 - 22th May Evening Shift
4

    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 $\left.=4.9 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right)$

AP EAPCET 2024 - 22th May Morning Shift
5

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

AP EAPCET 2024 - 22th May Morning Shift
6

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 $=1 \mathrm{~atm}$ )

AP EAPCET 2024 - 21th May Evening Shift Chemistry - Liquid Solution Question 6 English
AP EAPCET 2024 - 21th May Evening Shift
7

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

AP EAPCET 2024 - 21th May Evening Shift
8
A solution was prepared by dissolving 0.1 mole of a non- volatile solute in 0.9 moles of water. What is the relative lowering of vapour pressure of solution?
AP EAPCET 2024 - 21th May Morning Shift
9

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 $=273 \mathrm{~K}$ )

AP EAPCET 2024 - 20th May Evening Shift
10

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.

AP EAPCET 2024 - 20th May Morning Shift Chemistry - Liquid Solution Question 10 English $$ \begin{aligned} &\text { Table }\\ &\begin{array}{ccc} \hline \begin{array}{c} \text { Expt. } \\ \text { No } \end{array} & \begin{array}{c} \text { Pressure applied in } \\ \text { part-1 of vessel } \end{array} & \begin{array}{c} \text { Pressure applied in } \\ \text { part-II of vessel } \end{array} \\ \hline \text { I. } & 10 \mathrm{~atm} & - \\ \hline \text { II. } & - & 10 \mathrm{~atm} \\ \hline \text { III. } & 15 \mathrm{~atm} & - \\ \hline \text { IV. } & - & 15 \mathrm{~atm} \end{array} \end{aligned} $$
AP EAPCET 2024 - 20th May Morning Shift
11
The $\Delta T_b$ value for 0.01 m KCl solution is 0.01 K . What is the van't Hoff factor? $$ \left(K_b \text { for water }=0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right) $$
AP EAPCET 2024 - 19th May Evening Shift
12
200 g of $20 \% \frac{\mathrm{w}}{\mathrm{w}}$ urea solution is mixed with 400 g of $40 \% \frac{w}{w}$ urea solution. What is the weight percentage $\left(\frac{w}{w} \%\right)$ of resultant solution?
AP EAPCET 2024 - 19th May Evening Shift
13
At 293 K , methane gas was passed into 1 L . of water. The partial pressure of methane is 1 bar. The number of moles of methane dissolved in 1 L water is ( $K_{\mathrm{H}}$ of methane $=0.4 \mathrm{~K}$ bar)
AP EAPCET 2024 - 18th May Morning Shift
14

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?

$$\left(K_f\left(\mathrm{H}_2 \mathrm{O}\right)=1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right)$$

AP EAPCET 2022 - 5th July Morning Shift
15

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

AP EAPCET 2022 - 5th July Morning Shift
16

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

AP EAPCET 2022 - 4th July Evening Shift
17

$$x \%(w / V)$$ 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

AP EAPCET 2022 - 4th July Evening Shift
18

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 $$T(\mathrm{~K})=1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$$)

AP EAPCET 2022 - 4th July Morning Shift
19

Assertion (A) Blood cells collapse when suspended in saline water.

Reason (R) Cell membrane dissolves in saline water.

AP EAPCET 2022 - 4th July Morning Shift
20

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.

AP EAPCET 2021 - 20th August Morning Shift
21

If 500 mL of CaCl$$_2$$ solution contains 3.01 $$\times$$ 10$$^{22}$$ chloride ions, molarity of the solution will be

AP EAPCET 2021 - 20th August Morning Shift
22

Which condition is not satisfied by an ideal solution?

AP EAPCET 2021 - 19th August Evening Shift
23

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

AP EAPCET 2021 - 19th August Evening Shift
24

When difference in boiling points of two liquids is too small, then the separation is carried out by

AP EAPCET 2021 - 19th August Morning Shift
25

Which of the following will form an ideal solution?

AP EAPCET 2021 - 19th August Morning Shift
26

The molal elevation constant is the ratio of elevation in boiling point to

AP EAPCET 2021 - 19th August Morning Shift
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