i. The reaction of iron oxide with aluminium is known as…………..reaction. ii. The process of coating a thin layer of zinc on iron is known as…………

Question

Fill in the blanks:

i. The reaction of iron oxide with aluminium is known as…………..reaction.

ii. The process of coating a thin layer of zinc on iron is known as…………

iii. The metal that produces a sound on striking a hard surface is said to be………….

iv. The process in which carbonate ores are changed into oxides by heating strongly in limited air is known as …………….

v. …………compounds are insoluble in solvents like kerosene and petrol.

vi. …………… is used to obtain pure metals from impure metals.

vii. Corrosion can be prevented-by putting a layer of…………metal on corrosionable metal.

Answer 1

i. The reaction of iron oxide with aluminium is known as thermit reaction.

ii. The process of coating a thin layer of zinc on iron is known as galvanising.

iii. The metal that produces a sound on striking a hard surface is said to be sonorous.

iv. The process in which carbonate ores are changed into oxides by heating strongly in limited air is known as calcination.

v. Ionic compounds are insoluble in solvents like kerosene and petrol.

vi. Electrolys is method is used to obtain pure metals from impure metals.

vii. Corrosion can be prevented by putting a layer of non-corrosionable metal on corrosionable metal.