SEC 3 amthan 75

Gas that forms a precipitate when pass it into a solution in a confirmatory test ….

• Sulphur dioxide

• Carbon dioxide

• Oxygen

• Nitrogen dioxide

Precipitate which its color not affected by light is ………

• Silver chloride

• Silver iodide

• Silver bromide

• Iron II hydroxide

Sodium chloride solution and sodium nitrate solution can be differentiated by using ……………

• blue litmus paper.

• ammonia solution.

• silver nitrate solution.

• dil. sulphuric acid.

The opposite graphical figure represents the relation between the mass of an open conical flask contains two substances and the time of the experiment, what are these two substances? ……………

• Sodium hydroxide solution and ammonium nitrate solution.

• Silver nitrate solution and dil. hydrochloric acid.

• Calcium carbonate and dil. sulphuric acid.

• Nitric acid and magnesium.

Silver and barium cations form ppt. with …………… anion.

• phosphate

• nitrate

• bicarbonate

• chloride

Which of the following ions is reduced during its qualitative

analysis?

• Ammonium.

• Chloride

• Nitrate.

• Sulphate.

By adding iodine solution to sodium thiosulphate

• Thiosulphate group is oxidized into terathionate group

• iodine solution is strong reducing agent

• Thiosulphate group is reduced into tetralthionate group

• SO2 gas evolves

Removing color of KMnO4 by a substance, deduce that this substance is a/an …

• Strong oxidizing agent.

• Weak oxidizing agent.

• Reducing agent.

• Ammonium salt.

A colorless gas turns into reddish brown in the edge of reaction tube is …….

• SO3

• CO2

• NO2

• NO

Anion at its main experiment CO2 gas evolves and gives ppt with …… in its confirmatory test.

• AgNO3(aq)

• KMnO4(aq)

• MgSO4(aq)

• All of the previous