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AIC SS2 Chemistry 3rd C.A Second Term
  • 1. 1. What is the mass of 0.25mole of calcium?
A) 15g
B) 40g
C) 10g
D) 20g
  • 2. 2. How many moles of oxygen are present in 16g of oxygen gas?
A) 0.5mole
B) 32.0mole
C) 5.12mole
D) 1.0mole
  • 3. 3. How many moles are contained in 50g of magnesium trioxocarbonate (IV)? [Mg =24, C= 12, O =16]
A) 84 moles
B) 0.6 mole
C) 8.4 moles
D) 42.00 moles
  • 4. 4. When 100cm³ of a saturated solution of KClO3 at 40°c is evaporated,14g of the salt is recovered. What is the solubility of KClO3 at 40°c . [KClO3 = 122.5]
A) 1.14 mol/dm³
B) 8.80 mol/dm³
C) 11.42 mol/dm³
D) 0.88 mol/dm³
  • 5. 5. What is the solubility of X im mol/dm³ if 25cm³ of its saturated solution contains 4.0g of X? [X = 60g/mol]
A) 6.0
B) 1.7
C) 2.7
D) 0.27
  • 6. 6. One of the characteristics of the solute in a colloidal solution is that it can ..........
A) Not sedimentate
B) Dialyse
C) Coagulate
D) Not scatter light rays
  • 7. 7. Pollution of rivers by organic waste is harmful to aquatic organisms because of ........
A) Presence of heavy metal ions
B) Scarcity of food in water
C) Increase in the level of sediment
D) Reduction in the amount of dissolved oxygen
  • 8. 8. The furring of kettles is caused by the presence of ...........in water.
A) Calcium hydrogen trioxocarbonate (IV)
B) Calcium trioxocarbonate (IV)
C) Calcium tetraoxosulphate (VI)
D) Calcium hydroxide
  • 9. 9. Steam changes the colour of anhydrous cobalt (ii) chloride from ......
A) White to red
B) Blue to white
C) White to green
D) Blue to pink
  • 10. 10. The chemical used for coagulation in water purification is .....
A) Calcium tetraoxosulphate (VI)
B) Copper tetraoxosulphate (VI)
C) Aluminium tetraoxosulphate (VI)
D) Sodium tetraoxosulphate (VI)
  • 11. 11. Which of the following is used as water softener ?
A) CaCl2.2H20
B) Na2SO4.10H2O
C) Na2CO3.10H2O
D) MgSO4.7H2O
  • 12. 12. Which of the following processes will pollute water?
A) Exposure of a body of water to ultraviolet rays
B) Addition of a measured quantity of chlorine to water
C) Discharge of industrial effluents into water ways.
D) Passage of river water through a sand bed
  • 13. 13. Which of the following material is called non-biodegradable pollutant?
A) Wood
B) Animal hide
C) Paper
D) Plastics
  • 14. 14. The pollution from petroleum spillage in the rivers and lakes can best be dispersed by......
A) Pouring of organic solvent
B) Pouring of detergents
C) Evaporation
D) Passing of ships through the area
  • 15. 15. A solution which dissolves more solutes than it can normally hold at a particular temperature is said to be .......
A) Hydrated
B) Super saturated
C) Saturated
D) Unsaturated
  • 16. 16. The method than can be used to convert hard water to soft water is .........
A) The use of an ion -exchange resin
B) Passing over treated charcoal
C) Aeration
D) Chlorination
  • 17. 17. Water hardness could be caused by the presence of ........
A) Calcium trioxocarbonate (IV)
B) Sodium hydroxide
C) Calcium hydrogen trioxocarbonate (IV)
D) Sodium aluminium trioxo -silicate (IV)
  • 18. 18. Which of the following is not a treated water?
A) Distilled water
B) Spring water
C) Pipe borne water
D) Chlorinated water
  • 19. 19. --------- are heterogeneous mixture of undissolved particles in a given medium.
A) Solvent
B) Solution
C) Suspensions
D) Solute
  • 20. 20. The most common solvent in nature is referred to as.......
A) Colloids
B) Dispersion medium
C) Universal solvent
D) Concentration
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