States of Matter Test

Result

States of Matter Test - 69

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Weekly Quiz Competition

Question 1
1 / -0

Two liquids A and B have $${P_A}^0:{P_B}^0$$ = 1:3 at a certain temperature. If the mole fraction ratio $${x_A}:{x_B} = $$ 1:3, the mole fraction of A in vapour in equilibrium with the solution at the given temperature is -

A
0.1

B
0.2

C
0.5

D
1.0

Solution
Question 2
1 / -0

The vapour pressure of the solution of $$5\,g$$ on non-electrolyte in $$100\,g$$ of water at a particular temperature is $$2950\,N/{m^2}$$. The vapour pressure of water is $$3000\,N/{m^2}$$. The mocular mass of the solute is ?

A
$$54$$

B
$$124$$

C
$$180$$

D
$$340$$

Solution
Question 3
1 / -0

Which of the following solutions will have the lowest vapour pressure?

A
$$0.1 M\ Glucose$$

B
$$0.1 M\ NaCl$$

C
$$0.1 M\ BaCl_2$$

D
$$0.1 M Al_2 (SO_4)_3$$
Question 4
1 / -0

At a certain temperature, the vapour pressure of water is $$50\ mm.$$ The relative lowering of vapour pressure of a solution containing $$36\ g$$ of glucose in $$900\ g$$ of water is

A
$$0.1$$

B
$$0.5$$

C
$$0.004$$

D
$$3.75$$

Solution
Question 5
1 / -0

The mass of a non-volatile non-electrolyte solute (molar mass$$=50\ g\ mol^ {-1}$$) needed to be dissolved in $$114\ g$$ octane to reduce its vapour pressure to $$75\%$$ is:

A
$$37.5\ g$$

B
$$75\ g$$

C
$$150\ g$$

D
$$50\ g$$

Solution
Question 6
1 / -0

Vapour Pressure of methyl alcohol and ethyl alcohol solution is represented by $$P=115{ x }_{ A}+140$$. Where $${ x }_{ A }$$ is the mole fraction of methyl alcohol. The value of $$\lim _{ { x }_{ A }\rightarrow 0 }{ \frac { { P }_{ B }^{ 0 } }{ { x }_{ B } } } \\ $$

A
255

B
115

C
140

D
135

Solution
Question 7
1 / -0

The vapour pressure of $$1$$ molal glucose solution at $$100^{o}C$$ will be

A
$$760\ mmHg$$

B
$$76.0\ mmHg$$

C
$$1\ atm$$

D
$$746.32\ mmHg$$

Solution
Question 8
1 / -0

When a solution containing non-volatile solute is diluted with water,

A
its vapour pressure increases

B
its osmotic pressure increases

C
its boiling point increases

D
its freezing point increases

Solution
Question 9
1 / -0

An ideal solution formed by mixing two liquids 'A' and 'B' find the pressure at which $${X_A} = {Y_B}\ ({P_A}^0 = 400\ torr,{P_B}^0 = 100\,torr)$$

$$({X_A}$$ and $${Y_B}$$ are mole fraction of A and B in liquid and vapour forms respectively at equilibrium.)

A
250 torr

B
200 torr

C
150 torr

D
125 torr
Question 10
1 / -0

Vapour pressure increase with increase in :

A
Concentration of solution containing non-volatile soulute

B
Temperature up to boiling point

C
Temperature upto triple point

D
Altitude of the concerned place of boiling

Solution