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Salt
Test Description: Make it fun while learning
Instructions: Answer all questions to get your test result.
1) Which of the following mixture is normally used to prepare a pure sample of barium sulphate in the laboratary
A
Barium and concentrated sulphuric acid
B
Barium oxide and dilute sulphuric acid
C
Barium carbonate and sodium sulphate solution
D
Barium hydroxide solution and sodium sulphate solution
2) All of the following show the importance of knowing the solubility of salt except
A
to identify cations and anions through qualitative analysis
B
to separate a salt from mixture of salts
C
to make epsum salt to cleanse the intestine
D
to prepare a salt sample
3) Which of the following salt solution is colourless?
A
copper (II) sulphate
B
Cobalt (III) nitrate
C
iron (II) sulphate
D
Sodium chloride
4) Which of the following does not describe a salt
A
It is composed of a cation from an acid and anion from a base
B
The cations and anions are held together by strong ionic bonds
C
A salt is an ionic compound
D
It is formed when the hydrogen ions in an acid are replaced by metallic ions
5) Which of the following is the best way to prepare silver chloride salt
A
Reacting silver oxide with hydrochloric acid
B
Reacting silver metal with chlorine gas
C
Reacting silver metal with hydrochloric acid
D
Reacting between of silver nitrate and sodium chloride
6) Which of the following sulphate salts is soluble in water to form coloured aqueous solution?
A
Pottasium sulphate
B
lead (II) sulphate
C
Copper (II) sulphate
D
Calcium sulphate
7) The number of sodium ions in 500 cm^3 aqueous sodium chloride solution is 4x10^23 ions. What is the concentration of the solution? Avagadro constant= 6x10^23
A
3/2 mol dm^-3
B
2/3 mol dm^-3
C
4/3 mol dm^-3
D
3/4 mol dm^-3
8) What is minimum mass of magnesium required to react with excess dilute sulphuric acid to produce 224 cm^3 hydrogen gas at s.t.p. ? Molar volume of gas =22.4 dm3 mol^-1 at s.t.p.; RMM= 24
A
0.24g
B
2.40g
C
0.48g
D
0.12g
9) When 5g of solid hydrated copper (II) sulphate salt is heated, 3.2g dehydrated copper (II) sulphate is collected. What is the formula of the hydrated copper (II) sulphate salt? RMM: H=1, O=16, S=32, Cu=64
A
CuSO4.3H2O
B
CuSO4.7H2O
C
CuSO4.5H2O
D
CuSO4.2H2O
10) All of the following are examples of salt except
A
Magnesium Sulphate
B
Pottasium Nitrate
C
Zinc Oxide
D
Sodium Chloride
11) Which of the following will occur when aqueous potassium chloride is added to the aqueous silver nitrate solution in test tube?
A
Effervescence will be observed
B
The pH value of the solution is will decrease
C
A white precipitate will be formed
D
The contents of the test tube will become old
12) Which of the following nitrate salts does not produce brown gas when treated with heat?
A
potassium nitrate
B
lead (II) nitrate
C
zinc nitrate
D
Silver nitrate
13) Gas X is flown into an acidified potassium manganate (VII) solution. The colour of the solution changes from purple to colourless. What is gas X
A
sulphur dioxide
B
water vapour
C
nitrogen dioxide
D
hydrogen gas
14) Salt P is a colourless solid that produces brown gas when it is treated with heat. When sodium chloride solution is added to the salt P solution, a white precipitate that dissolves in hot water is obtained. Salt P probably
A
silver nitrate
B
zinc nitrate
C
lead (II) nitrate
D
magnesium nitrate
15) When aqueous salt X is reacted with sodium chloride, a white precipitate that dissolves in hot water is formed. What salt is produced if X is reacted with copper (II) sulphate?
A
Sodium sulphate
B
Lead (II) chloride
C
copper (II) chloride
D
Lead (II) sulphate
*select an answer for all questions
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