Name the metals present in the following alloys:

(a) Brass

(b) Bronze

(c) Duralumin

(d) Stainless steel

Give four differences between metals and non-metals with reference to their:

(a) Melting point and boiling point

(b) Conductivity of heat and electricity

(c) Malleability

(d) Solubility in water.

Give two uses of:

(a) Silicon

(b) Antimony

(c) Tungsten

(d) Germanium

Fill in the blanks:

(a) The most ductile metal is …………… .

(b) A metal stored in kerosene oil is …………… .

(c) Tungsten metal is a good conductor of …………… .

(d) …………… is a soft metal.

(e) …………… is the hardest compound known to us.

(f) A non-metal used to purify water is …………… .

(g) A metal that gives dazzling effect to crackers when they explode is …………… .

(h) A chemical compound that makes up the striking heads of match sticks is …………… .