Ch.3A Prepn of salts

NAME OF THE STUDENT:

ROLL NO.

A black coloured solid which on reaction with dilute sulphuric acid forms a blue coloured solution is:

• Carbon
• Manganese [IV] oxide
• Lead [II] oxide
• Copper [II] oxide

A compound soluble in hot water but insoluble in cold water

• Nitroso Iron [II] sulphate
• Lead [II] chloride
• Chromium sulphate
• Iron [Ill]chloride

Anhydrous iron [III] chloride is prepared by

• Direct combination
• Simple displacement
• Decomposition
• Neutralization.

A soluble salt formed by direct ‘combination between a light metal & a greenish yellow gas.

• FeCl3
• CaCl2
• NaCl
• CaSO4

Choose the method of preparation of Iron sulphate from the methods given

• Neutralization
• Precipitation
• Direct combination
• Substitution ( Displacement )