Chemistry · JEE

Colligative properties of dilute solutions: a relative lowering of vapour pressure, depression of freezing point, the elevation of boiling point and osmotic pressure Mock Test for JEE

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Part of Solutions in JEE Main Chemistry.

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Q1ChemistryUnit 5: Solutions

The observed osmotic pressure for a

0.10 M

solution of

F e\left(N H_{4}\right)_{2}\left(S O_{4}\right)_{2}

25^{\circ} C

is 10.8 atm. The expected and experimental (observed) values of Van't Hoff factor (i) will be respectively:

\left(\boldsymbol{R}=\mathbf{0 . 0 8 2} \quad \boldsymbol{L} \quad \boldsymbol{a t m} \quad \boldsymbol{k}^{-} \boldsymbol{m o l}^{-1}\right)

Q2ChemistryUnit 5: Solutions

Which type of phenomenon is used when coloured dye is removed from solution of sugar by charcoal?

Q3ChemistryUnit 5: Solutions

At constant temperature, the osmotic pressure of a solution is: This question has multiple correct options

Q4ChemistryUnit 5: Solutions

18 g glucose

\left(C_{6} H_{12} O_{6}\right)

is added to

178.2 \mathrm{g}

of water. The vapour pressure of this aqueous solution at

100^{0} C

in torr is:

Q5ChemistryUnit 5: Solutions

The vapour pressure of an aqueous solution is found to be 750 torrs at certain temperature 'T'. If 'T' is the temperature at which pure water boils under atmospheric pressure and same solution show elevation in the boiling point

\Delta T_{b}=1.04 K,

find the atmospheric pressure?

\left[\boldsymbol{K}_{\boldsymbol{b}}=\mathbf{0 . 5 2} \boldsymbol{K} \boldsymbol{k g m o l}-\mathbf{1}\right]

Q6ChemistryUnit 5: Solutions

The Brownian movement is due to:

Q7ChemistryUnit 5: Solutions

A colloidal system having a solid substance as a dispersed phase and a liquid as a dispersion medium are classified as:

Q8ChemistryUnit 5: Solutions

A mixture of chlorobenzene and wate (immiscible) boils at

90.3^{\circ} \mathrm{C}

at an external pressure of

740.2 \mathrm{mm} .

The vapour pressure of pure water at

90.3^{\circ} \mathrm{C}

530.1 \mathrm{mm}

. Calculate the

\%

composition of distillate:

Q9ChemistryUnit 5: Solutions

Which one of the following method is a commonly used method for destruction of colloid?

Q10ChemistryUnit 5: Solutions

A solution containing 5 g acetic acid in 100 g

\boldsymbol{H}_{2} \boldsymbol{O}\left(\boldsymbol{O}_{\boldsymbol{H}_{2}}^{0} \boldsymbol{O}=\mathbf{2} \boldsymbol{3} . \mathbf{7} \mathbf{5} \boldsymbol{6} \boldsymbol{m} \boldsymbol{m} \text { at } \mathbf{2} \mathbf{5}^{\boldsymbol{o}} \boldsymbol{C}\right.

shows a vapour pressure of

23.40 \mathrm{mm}

whereas same mass of acetic acid in

100 \mathrm{g} C_{6} H_{6}\left(P_{C_{6} H_{6}}^{0}=72.5 m m \text { at } 25^{\circ} C\right)

shows a vapour pressure of

70.0 \mathrm{mm}

Assuming non-volatile nature of

C H_{3} C O O H,

discuss the data given to discuss hydrogen bonding:

Q11ChemistryUnit 5: Solutions

Molal elevation constant and molal depression constant of water respectively

\left(\text { in } \quad K m^{-1}\right)

are:

Q12ChemistryUnit 5: Solutions

Lowering in vapour pressure is highest for:

Q13ChemistryUnit 5: Solutions

Dissolution of a non-volatile solute into a liquid leads to the-

Q14ChemistryUnit 5: Solutions

Smoke is an example of:

Q15ChemistryUnit 5: Solutions

Gelatin has the minimum protective powers.

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