CBSE - Matter in Our Surroundings

1 Matter in Our Surroundings 

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
 

2 Matter in Our Surroundings 

The method to purify the colloidal solution

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

3 Matter in Our Surroundings 

On heating a liquid, its surface tension:

(1) increases
(2) Decreases
(3) remains same
(4) is reduced to zero

4 Matter in Our Surroundings 

Which one of the following is a pseudo solid?

(1) Calcium fluoride
(2) Glass
(3) Sodium chloride
(4) All of the above

5 Matter in Our Surroundings 

Which of the following is made by hydrolysis of starch ?

(1) glucose
(2) fructose
(3) sucrose
(4) maltose

6 Matter in Our Surroundings 

Miscible liquid among the following is

(1) alcohol in water
(2) milk
(3) oil in water
(4) kerosene in water

7 Matter in Our Surroundings 

The interparticle attractive force ______ with increasing distance between particles.

(1) increases
(2) decreases
(3) increases moderately
(4) none

8 Matter in Our Surroundings 

The decreasing order of densities of solids, liquids, and gases for a given mass is:

(1) solid > gases > liquids
(2) gases > solids > liquids
(3) liquids > gases > solids
(4) solids > liquids > gases

9 Matter in Our Surroundings 

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

10 Matter in Our Surroundings 

A solid cube of iron whose edge is 4 inches weighs 20.8 lbs. Determine the specific gravity of this sample of iron, if water weighs 62.4 pounds per cubic foot?

(1) 4.5
(2) 5.2
(3) 9.0
(4) 27