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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
Carbonate Ion
B
Nitrate Ion
C
Sulfate Ion
D
Chloride 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
Ammonium Ion
B
Potassium Ion
C
Calcium Ion
D
Zinc Ion
3) What property do sulfur dioxide and carbon dioxide have in common?
A
They have a pungent smell.
B
They react with acidified potassium dichromate (VI)
C
They react with acidified potassium manganate (VII)
D
They are colourless
4) Which state is not true about ammonia gas?
A
It turns moist Universal Indicator paper blue.
B
It has a pungent smell.
C
It is soluble in water.
D
It is a brown gas.
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
Iron (II) sulfate
B
Lead (II) nitrate
C
Potassium chloride
D
Copper (II) carbonate
6) What compound in solution produces a precipitate with aqueous ammonia that does not dissolve when an excess of ammonia is added?
A
Potassium hydroxide
B
Copper (II) sulfate
C
Iron (II) chloride
D
Zinc chloride
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
C. Potassium Nitrate
D
A. Ammonium sulfate
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
Ammonium sulfate
C
Lime
D
Sulfur dioxide
9) Solution X turns acidified potassium dichromate (VI) from orange to green. What must solution X contain?
A
An oxidizing agent
B
A reducing agent
C
An ammonium salt
D
An alkali
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
Cu 2+
B
Al 3+
C
Fe 2+
D
Zn 2+
*select an answer for all questions
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