(a) Phosphorus is a very ................. non-metal.

(2) The most ductile metal is ................. .

(c) A metal which is stored in kerosene oil is .................

(d) Iron is ................. reactive than copper.

(e) A non-metal which is used to purify water is ................. .

(g) Chemical formula of rusting of iron .................

(f) Metals react with acid to produce ................. gas.

(1) Sodium is a non-metal.

(2) Copper displaces zinc from zinc sulphate solution.

(3) Coal can be drawn into wire.

(4) Potassium can be cut with a knife.

(5) ) Air and moisture are the essential conditions for corrosion.

(2) Write two conditions for corrosion.

(4) What is a compound?

(5) Name the metal used as a thermometric liquid.

(1) What are metalloids?

(3) What is an element?

(1) What are noble gases? Write the names of the noble gases.

(2) Write the uses of helium gas.

(3) Explain the term corrosion.

(4) What is a metal? Give some examples.

(5) Explain the occurrence of non-metals.

(1) Write two uses of each of the following: (i) Silicon (ii) Germanium (iii) Antimony

(2) Explain electroplating. Write the application of electroplating.

(3) Why are gold, silver and platinum considered as noble metals?

Malleability

Na

Helium

Iron

Zinc