16
Question Question 16
State a specific reason for using –
(a) steel in automobiles
(b) gold in jewellery
(c) copper in electrical cables
(d) zinc in galvanizing
(e) lead in bullets
(f) magnesium in fireworks.
(a) Steel in automobiles — It is malleable with high tensile strength.
(b) Gold in jewellery — It is expensive, lustrous, malleable and ductile.
(c) Copper in electrical cables — It is a good conductor of electricity.
(d) Zinc in galvanizing — It prevents rusting.
(e) Lead in bullets — It has high specific gravity.
(f) Magnesium in fireworks — It burns with a dazzling light.