Chemistry: Question Preview (ID: 3902)

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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) Ammonium nitrate
c) Sodium chloride
d) Ammonium chloride

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 gas is produced
b) An insoluble salt is produced
c) The final pH is 7
d) Water is produced

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 hydrochloric and Nitrate Y is calcium.
b) Acid X is nitric and nitrate Y is zinc
c) Acid X is sulfuric and Nitrate Y is aluminium
d) Acid X is sulfuric white Nitrate y is barium

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) Ammonium and Copper (II)
b) Ammonium and Iron (II)
c) Iron (II) and nitrate
d) Copper (II) and nitrate

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) Copper (II) nitrate
b) Iron (II) nitrate
c) Iron (III) nitrate
d) Zinc Nitrate

2 aqueous solutions, X and Y, are mixed together. Which one of the following pairs would not give a white precipitate?
a) X is magnesium nitrate, Y is sodium sulfate
b) X is lead(II) nitrate and Y is sodium chloride
c) X is calcium nitrate and Y is sodium carbonate
d) X is barium nitrate and Y Is sodium sulfate.

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) Dark blue solution is formed.
c) White precipitate is formed in dark blue solution
d) The mixture is light blue in colour.

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 chloride
d) Calcium sulfate

Which one of the following would not give a visible reaction with dilute hydrochloric acid?
a) Solid copper (II) oxide
b) Solid calcium carbonate
c) Aqueous sodium hydroxide
d) Aqueous lead(II) nitrate

Hydrogen gas reacts with nitrogen under high pressure and temperature in Haber Process to give?
a) Water
b) Ammonia
c) Carbon Dioxide
d) Oxygen

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