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Chemistry
Test Description: Qualitative Analysis
Instructions: Answer all questions to get your test result.
1) Excess of sodium hydroxide is added to aqueous solution of salt X and boiled. Ammonia gas is given off after aluminium foil is added to hot solution. What could X be?
A
Sodium nitrate
B
Sodium chloride
C
Ammonium nitrate
D
Ammonium chloride
2) An excess of dilute sulfuric acid reacts with both aqueous barium hydroxide and aqueous barium chloride. In what way are the 2 reactions the same?
A
An insoluble salt is produced
B
The final pH is 7
C
Water is produced
D
An gas is produced
3) X, an acid, was added to a solution of the nitrate of metal Y. A dense white precipitate was formed. What are X and Y?
A
Acid X is sulfuric white Nitrate y is barium
B
Acid X is sulfuric and Nitrate Y is aluminium
C
Acid X is nitric and nitrate Y is zinc
D
Acid X is hydrochloric and Nitrate Y is calcium.
4) Pale green solution X gives green ppt with excess aqueous sodium hydroxide. Alkaline gas is given off when the mixture is warmed with powdered aluminum. What does X contain?
A
Copper (II) and nitrate
B
Iron (II) and nitrate
C
Ammonium and Copper (II)
D
Ammonium and Iron (II)
5) In separate experiment,excess of aqueous sodium hydroxide or aqueous ammonia was added to solution X.In both experiments,ppt was obtained which dissolve in excess of added reagent.
A
Iron (III) nitrate
B
Iron (II) nitrate
C
Copper (II) nitrate
D
Zinc Nitrate
6) 2 aqueous solutions, X and Y, are mixed together. Which one of the following pairs would not give a white precipitate?
A
X is barium nitrate and Y Is sodium sulfate.
B
X is magnesium nitrate, Y is sodium sulfate
C
X is lead(II) nitrate and Y is sodium chloride
D
X is calcium nitrate and Y is sodium carbonate
7) Excess ammonia solution is added to an aqueous solution which contains calcium and copper (II) ions. Which of the following is a correct observation?
A
Blue precipitate is formed.
B
White precipitate is formed in dark blue solution
C
Dark blue solution is formed.
D
The mixture is light blue in colour.
8) Add dilute nitric acid followed by aqueous silver nitrate to Z; white ppt is formed. Add sodium hydroxide solution in excess to Z; white ppt that is insoluble is formed. What is Z?
A
Aluminium chloride
B
Aluminium sulfate
C
Calcium sulfate
D
Calcium chloride
9) Which one of the following would not give a visible reaction with dilute hydrochloric acid?
A
Solid copper (II) oxide
B
Aqueous sodium hydroxide
C
Aqueous lead(II) nitrate
D
Solid calcium carbonate
10) Hydrogen gas reacts with nitrogen under high pressure and temperature in Haber Process to give?
A
Oxygen
B
Carbon Dioxide
C
Water
D
Ammonia
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