A specific temperature and pressure where solid, liquid, and gas phases exist simultaneously, is called:

(1) the point of equilibrium
(2) the triple point
(3) the freezing point
(4) the point where reactants first form products
 

Calculate the molal depression constant of a solvent which has freezing point 16.6oC and latent heat of fusion 180.75 J/g.

(1) 2.68
(2) 3.86
(3) 4.68
(4) 2.86

Two identical beakers labeled as (X) and (Y) contain 100 cm³ of water each at 20^oC. To the water in the beaker (X), 100g of water at 0^o C was added and stirred to mix thoroughly. To the beaker (Y), 100g of ice at 0^oC was added and stirred till it melted into water. The water in the beaker (Y) will be:

(1) hotter than water in beaker X
(2) colder than water in beaker X
(3) heavier than water in beaker X
(4) lighter than water in beaker X

The method to purify the colloidal solution

(1) peptization
(2) coagulation
(3) dialysis
(4) bredig's arc method

Cheese is an example of which type of colloid?

(1) Gel
(2) Foam
(3) Sol
(4) Solid sol