Solutions Test 32

Result

Solutions Test 32

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following pairs do not form ideal solution

A
$${{\text{C}}_6}{{\text{H}}_6}\;and\;{\text{CC}}{{\text{l}}_4}$$

B
$${{\text{C}}_6}{{\text{H}}_6}\;{\text{and}}\;{{\text{C}}_6}{{\text{H}}_5}{\text{CH}}$$

C
$${{\text{C}}_2}{{\text{H}}_5}Br\;and\;{{\text{C}}_2}{{\text{H}}_5}{\text{l}}$$

D
none.

Solution
Question 2
1 / -0

The vapour pressure of water at T(K) is 20 mm Hg. The following solutions are prepared at T(K) :

A
6 g of urea (mol. wt. = 60) is dissolved in 178.2 g of water

B
0.01 mole of glucose is dissolved in 179.82 g of water

C
5.3 g of $$N{a_2}C{O_3}$$ (mol. wt. =106) is dissolved in 179.1 g of water.

D
non of these

Solution
Question 3
1 / -0

If $${X_A}$$ and $${X_B}$$ represent mole fraction in liquid phase while $${y_A}$$ and $${y_B}$$ represent mole fraction in vapour phase in binary solution. Which of the following statements is/are correct?

A
At point C liquid and vapour phase have same composition

B
Vapour pressure of B is less than A

C
Intermolecular forces in the solution are weaker than between like particles

D
All of these
Question 4
1 / -0

The volume of 0.0168 mol of $${ O }_{ 2 }$$ obtained by decomposition of $${ KCIO }_{ 3 }$$ and collected by displacement of water is 428ml at a pressure of 754 mm Hg at $${ 25 }^{ 0 }C.$$ The pressure of water vapour at $${ 25 }^{ 0 }C$$ is:

A
18 mm Hg

B
20 mm Hg

C
22 mm Hg

D
24 mm Hg

Solution
Question 5
1 / -0

Colligative properties of a dilute solution depend on

A
Nature of solute

B
Nature of solvent

C
Number of solute particles

D
Number of solvent particles

Solution
Question 6
1 / -0

Van't Hoff factor for molar aqueous solution of A, B and C are 1.4, 0.6 and 2.3. Which is correct for above solutions
?

A
Boiling point of solution A>B>C

B
Freezing point of solution C

C
Osmotic pressure A=B=C

D
Vapour pressure C

Solution
Question 7
1 / -0

Two liquids A & B form an ideal solution. What is the vapour pressure of solution containing 2 moles of A and 3 moles of B at 300 K? [Given: At 300 K, Vapour pr. of pure liquid A $$\left( P\begin{matrix} 0 \\ A \end{matrix} \right) $$=100 torr, Vapour pr. of pure liquid B $$\left( P\begin{matrix} 0 \\ B \end{matrix} \right) $$=300 torr]

A
200 torr

B
140 torr

C
180 torr

D
None of these

Solution
Question 8
1 / -0

Molar volume of liquid A (d=0.8 gm/ml) increase by a factor of 2000 when it vapourises at 2000K. The vapour pressure of liquid A at 200K is:
[R=0.08 L-atm/mol-K] (Molar mass of A=80 g/mol)

A
0.4 atm

B
8 atm

C
0.8 atm

D
0.08 atm

Solution
Question 9
1 / -0

In the accompanied diagram, the ideal behaviour of a solution is shown by the line/s

A
AD

B
CB

C
BD

D
AD,CB

Solution
Question 10
1 / -0

Observe the following abbreviations, $$\pi _{obs}=$$ observed colligative property, $$\pi_{cal} = $$ theoretical colligative property, assuming normal behaviour of solute. Van't Haff factor (i) is given by:

A
$$I= \pi_{obs}\times \pi_{cal}$$

B
$$I= \pi_{obs} + \pi_{cal}$$

C
$$I= \pi_{obs}-\pi_{cal}$$

D
$$\displaystyle I= \frac{\pi_{obs}}{\pi_{cal}}$$

Solution