Chemistry: Question Preview (ID: 3901)

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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) Chloride Ion
c) Nitrate Ion
d) Sulfate Ion

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) Calcium Ion
c) Potassium Ion
d) Zinc Ion

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

Which state is not true about ammonia gas?
a) It has a pungent smell.
b) It is a brown gas.
c) It is soluble in water.
d) It turns moist Universal Indicator paper blue.

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) Iron (II) sulfate
c) Lead (II) nitrate
d) Potassium chloride

What compound in solution produces a precipitate with aqueous ammonia that does not dissolve when an excess of ammonia is added?
a) Copper (II) sulfate
b) Potassium hydroxide
c) Iron (II) chloride
d) Zinc chloride

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) A. Ammonium sulfate
b) B. Hydrochloric Acid
c) C. Potassium Nitrate
d) D. Sulfuric Acid

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) Ammonium sulfate
b) Lime
c) Oxygen
d) Sulfur dioxide

Solution X turns acidified potassium dichromate (VI) from orange to green. What must solution X contain?
a) An alkali
b) An ammonium salt
c) An oxidizing agent
d) A reducing agent

Aqueous sodium hydroxide reacts with a metal ion producing a coloured precipitate. This precipitate changes colour on standing. What is the ion present?
a) Al 3+
b) Fe 2+
c) Cu 2+
d) Zn 2+

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