Q35 of 252 Page 57

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

Two properties that aluminium is a metal:

(i) Aluminium is malleable i.e. it has ability to be flattened into thin sheets by hammering or rolling.


(ii) Aluminium is good conductor of heat and electricity.


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33

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

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Compare the properties of metals and non-metals with respect to (i) malleability (ii) ductility, and (iii) electrical conductivity.

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Give reason why:

(a) copper metal is used for making electric wires.


(b) graphite is used for making electrode in a dry cell

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How would you confirm that a colourless liquid given to you is pure water?