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Chemistry
Test Description: Qualitative Analysis
Instructions: Answer all questions to get your test result.
1) A solution contains the anion Y and dilute nitric acid. It produced a white precipitate with silver nitrate and a white precipitate with lead(II) nitrate. What ion could Y be?
A
Sulfate Ion
B
Nitrate Ion
C
Chloride Ion
D
Carbonate Ion
2) X gave white ppt with sodium hydroxide solution, dissolved in excess sodium hydroxide solution. In aqueous ammonia, it produced white ppt that was soluble in excess aqueous ammonia
A
Calcium Ion
B
Potassium Ion
C
Ammonium Ion
D
Zinc Ion
3) What property do sulfur dioxide and carbon dioxide have in common?
A
They react with acidified potassium manganate (VII)
B
They have a pungent smell.
C
They are colourless
D
They react with acidified potassium dichromate (VI)
4) Which state is not true about ammonia gas?
A
It is soluble in water.
B
It is a brown gas.
C
It turns moist Universal Indicator paper blue.
D
It has a pungent smell.
5) Dilute nitric acid was added to a colourless solution S. the acidified solution of S reacted with silver nitrate to give a white precipitate. What is S most likely to be?
A
Copper (II) carbonate
B
Potassium chloride
C
Iron (II) sulfate
D
Lead (II) nitrate
6) What compound in solution produces a precipitate with aqueous ammonia that does not dissolve when an excess of ammonia is added?
A
Zinc chloride
B
Iron (II) chloride
C
Potassium hydroxide
D
Copper (II) sulfate
7) Compound X reacts with some metals to liberate hydrogen and is used to make fertilizers. It gives a white precipitate when added to aqueous barium nitrate. What is X?
A
D. Sulfuric Acid
B
B. Hydrochloric Acid
C
A. Ammonium sulfate
D
C. Potassium Nitrate
8) Wastewater from a factory was found to have a pH value of 2. Which substance could be used to neutralize the wastewater before it is released into the river?
A
Oxygen
B
Sulfur dioxide
C
Ammonium sulfate
D
Lime
9) Solution X turns acidified potassium dichromate (VI) from orange to green. What must solution X contain?
A
An alkali
B
A reducing agent
C
An ammonium salt
D
An oxidizing agent
10) Aqueous sodium hydroxide reacts with a metal ion producing a coloured precipitate. This precipitate changes colour on standing. What is the ion present?
A
Zn 2+
B
Fe 2+
C
Cu 2+
D
Al 3+
*select an answer for all questions
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