Chemistry IX - Solution of Suspension

Chemistry IX - Solution of Suspension

1. Calculate the molarity of solution containing 4g NaOH in 500 cm3 solution?

a) M=0.4M
b) M=0.3M
c) M=0.1M
d) M=0.2M

2. Calculate the molality of solution containing 5.3g of Na2CO3 in 500g of water.

a) Molality=0.1m
b) Molality=0.3m
c) Molality=0.5m
d) Molality=0.6m

3. A solution is prepared by dissolving 1 mole of ethyl alchol C2H5-OH in 3 moles of water (H2O) . Calculate mole fraction of ethyl alcohol and water.

a) XA=0.23 XB=0.72
b) XA=0.24 XB=0.70
c) XA=0.25 XB=0.75
d) XA=0.21 XB=0.71

4. The suspended particles in suspension are generally of the size.

a) 10nm
b) 100nm
c) 1200nm
d) 1nm

5. The sum of the mole fraction of solute and solvent is equal to :

a) 2
b) 5
c) 0
d) 1

6. Solubility is defined as the amount of solute in gram at a given temperature dissolved in _________ of the solvent.

a) 20g
b) 100g
c) 10g
d) 200g

7. The process in which a solid directly changes to vapours is known as :

a) Sublimation
b) Evaporation
c) Diffusion
d) Fusion

8. A solution , which contains exess amount of solute as compared to that of solvent is called :

a) Dilute
b) None of these
c) Concentrated
d) Aqueous

9. A mixture in which solute particles do not dissolve in solvent is called:

a) Molar solution
b) Collidal solution
c) Suspension
d) None of the above

10. _____________is a soluble in water:

a) Kerosene oil
b) Methanol
c) Chloroform
d) None of the above

11. 4% by mass of sodium chloride means ___g sodium chloride per 100g of solution:

a) 4
b) 96
c) 58
d) 5

12. __________is an example of liquid in liquid solution:

a) Carbonated water
b) Alcohol
c) Carbon di sulphide
d) None of the above

13. ___________is an example of solid in solid solution:

a) Bronze
b) Fog
c) Smoke
d) None of these

14. Aqueous solution of NH4CI is ___________in nature:

a) Basic
b) None of the above
c) Acidic
d) Neutral

15. According to Henry's Law m=KP here 'm' means _________________

a) Constant
b) Mass
c) Amount of gas
d) None of these

16. A suspension of fine particles of gas in a liquid is called:

a) Emulsion
b) Foam
c) Smoke
d) None of the above

17. A suspension of droplets of one liquid into another liquid which in not soluble is called as:

a) Mud
b) Non of these
c) Mist
d) Emulsion

18. One nanometere(1mm)=_____________

a) 10-6
b) 10-8
c) None of the above
d) 10-9

19. One litre =__________________millimetres:

a) 100
b) 1000
c) 10000
d) 100000

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