principles of metallurgy

The most abundant element in the earth's crust?

• Iron

• Aluminum

• copper

• Silver

Galena is an ore of------------

what is gangue in metallurgy?

corrosion occurs in presence of

• only air

• only water

• both air and water

• without air and water

Oil used in the froth flotation process

• coconut

• palm

• pine

• ginger

Method used to enrich the sulphide ore

which of the following is a highly reactive metal?

• Fe

• Cu

• K

• Ag

Write any two ores of Iron?

Metals occur in the native form are