Test: Colligative Properties - 3 - Chemistry MCQ

Y g of non–volatile organic substance of molecular mass M is dissolved in 250 g benzene. Molal elevation constant of benzene is Kb. Elevation in its boiling point is given by:

The freezing point of aqueous solution contains 5% by mass urea, 1.0% by mass KCl and 10% by mass of glucose is

The values of observed and calculated molecular weights of silver nitrate are 92.64 and 170 respectively. The degree of dissociation of silver nitrate is:

Which of the following aqueous solutions has the highest boiling point & minimum freezing point?

Among the following the solution which shows the highest osmotic pressure at 25ºC is:

If a solute undergoes dimerisation and trimerisation, the minimum values of Vant Hoff factors respectively are:

Osmotic pressure of 4% (w/v) urea solution is 1.64 atm and that of 3.42% (w/v) cane sugar is 2.46 atm. When equal volume of the above two solutions are mixed, the osmotic pressure of the resulting solution is:

When mercuric iodide is added to an aqueous solution of potassium iodide then:

Which of the following will have same value of Vant Hoff factor (i) as that of K₄[Fe(CN)₆]:

If Pº and P_s are the V.P. of solvent and its solution respectively and N₁ and N₂ are the moles of solute and solvent then:

At constant temperature, the osmotic pressure of a solution is:

The value of Ebullioscopic constant or boiling point elevation constant depends on:

Which of the following pairs of solution are expected to be isotonic at the same temperature:

Isotonic solution have:

The Vant Hoff factor is:

Ideal solution is formed when to components:

When a non-volatile solute is added to a pure solvent, which statement(s) hold true:

An aqueous solution of glucose boils at 100.01ºC. The mo lal elevat ion constant for water is 0.5 K Kg mol^–1. The number of glucose molecules in the solution containing 100 g of water are x × 10²¹. The value of x is ______.

The apparent degree of ionization of KCl in water at 290 K is 0.86, the mass of KCl which must be made up to 1 dm³ of aqueous solution so as to produce the same osmotic pressure as the 4% solution of glucose at that temperature is ______g.

An aqueous solution containing 288 g of a non–volatile compound having the stoichiometric composit ion C_xH_2xO_x in 90 g water boils at 101.24ºC at 1 atmospheric pressure. What is the value of x? (Given that: Kb(H₂O) = 0.512 K Kg mol^–1):

The freezing point of a solution of acetic acid (mole fraction is 0.02) in benzene is 277.4 K. Acetic acid exists partly as a dimer. Freezing point of benzene is 278.4 K and K_f for benzene is 5 K kg mol^–1. The equilibrium constant for dimerisation is ______ kg mol^–1:

The relative lowering of vapour pressure of an aqueous solution of a non–volatile solute of molecular weight 60 (which neither dissociates nor associates in the solution) is 0.018. If K_f of water is 1.86º cm^–1, the depression in freezing point will be ______ºC.