Q38 of 102 Page 77

State any two physical properties for believing that aluminium is a metal.

Aluminium is highly malleable and ductile. Due to this property, aluminium is used in the production of utensils and wire. Aluminium is a good conductor of heat which makes it ideal for making utensils.


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36

State two physical properties on the basis of which metals can be distinguish from non-metals.

 37

Name the gas produced when aluminium foil reacts with:

(a) dilute hydrochloric acid.


(b) Sodium Hydroxide solution.

 39

Compare the properties of metals and nonmetals with respect to:

(i) malleability (ii) ductility and


(iii)conduction of heat and electricity

 40

Give reason why.

(a) Copper metals used for making electric wires.


(b) Graphite is used for making electrode in a cell.


(c) Immersion rods for heating liquids are made of metallic substances.