Test: Colligative Properties (Elevation in Boiling Point) - NEET MCQ

For a dilute solution containing 2.5 g of a non-volatile non-electrolyte solute in 100 g water, the elevation in boiling point at 1 atm pressure is 2°C. Assuming concentration of solute is much lower than the concentration of solvent, the vapour pressure (mm of Hg) of the solution is (Take, K_b = 0.76 K mol^-1 kg).

[IITJEE2012]

Relative lowering of vapour pressure of a non-volatile solute X in water is 0.05. If   K_b(H₂0) = 0.52° mol^-1  kg^-1.

(ΔT_b) = elevation in boiling point assuming a dilute solution

(AT_b)' = elevation in boiling point assuming a solution of moderate concentration then, {ΔT_b) - {ΔT_b)' =

6% aqueous solution of urea (by mass of solvent) has elevation in boiling point xt. 18% aqueous solution of glucose (by mass of solvent) has elevation in boiling point x₂. If these two solutions are mixed then, elevation in boiling point is x₃. Then,

AB is a sparingly soluble salt in aqueous solution with K_sp =1x10^-8. If K_b(H₂0 ) = 0.52° mol^-1 kg then elevation in boiling point of saturated solution is 

Elevation in boiling point of a solution of non-electrolyte in non-polar solvent (toluene) is 0.3°. Mole fraction elevation constant of non-polar solvent is 36.1 K. Thus, molality (mol kg^-1) of the solution is

Which of the given aqueous solution has maximum boiling point? 

(K_b of H₂0 = 0 .5 2 ° mol^-1 kg), T_b (H₂0 ) = 373 K)

X and Y both are soluble in given solvent. Molar mass of the polymer Y is

Given, H₂0 ( / ) H₂0 ( g ) a t 373 K, ΔH° = 9.72 kcal mol^-1 and the concentration of the sucrose in water is 0.1 M. Find the elevated boiling point of water.

Glucose solution is 20% by weight of solution. Its boiling point is ........
Given 1 molal urea solution boils at 100.52° C and water boils at 1 atm pressure,

Latent heat of fusion and latent heat of vaporisation of a solvent are in the ratio of 1: 6 and freezing point and boiling point (in Kelvin scale) are in the ratio of 2:3. Thus, ratio of elevation in boiling point to depression in freezing point of 1 molal solution is

One or More than One Options Correct Type
This section contains 2 multiple type questions. Each question has 4 choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.

Q. Out of the following, colligative properties are

10% aqueous solution of a non-electrolyte solute of molar mass (m) has elevation in boiling point x°, then 

Comprehension Type
This section contains a passage describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer out of the given 4 options (a), (b), (c) and (d)

Passage

Heavy water boils at 101.42°Cand its molal elevation constant ( K_b ) is 10% higher than that of pure water. Elevation in 0.1 molal aqueous urea solution is 0.052°.

Q. What is the molal elevation constant (in K mol^-1 kg) of heavy water?

What is the latent heat of vaporisation of heavy water?

Matching List Type
Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct
Q. One molal aqueous sucrose solution boils at 100.52° C and water boils at 100° C. 5% aqueous solution (by mass of solvent) of non-electrolyte A B 2 boils at 100.26° C, 9% aqueous solution (by mass of solvent) of non-electrolyte A 2B boils at 100.52°C. Match the molar masses given in Column II with the species in Column l and select the answer from the codes given below.

Codes

One Integer Value Correct Type
This section contains 2 questions, when worked out will result in an integer value from 0 to 9 (both inclusive)

Q. A solution containing 3.975 g of sulphur in 100 g ofCS₂ boils at 319.67 K. The boiling point of pure CS₂ is 319.30 K.
K_b( CS₂ ) = 2.406° mol^-1 kg
If molecular state of sulphur is (S)x then what is the value of x?

An aqueous solution containing 28.4 g of non-volatile compound having the stoichiometric composition C_nH_2nO_n in 100 g water boils at 101.24°Cat 1 atm pressure. K_f (H₂0 ) = 0.52° mol^-1 kg and boiling point of H₂0 = 373 K. What is the value of n?