Question

Write four important purposes of making alloy. Write the constituents of following alloys : (i) Brass (ii) Bronze (iii) Solder (iv) Stainless Steel.

Answer 1

1) Alloys are made to improve hardness and strength of metals.
2) Alloys are made to improve resistance against corrosion.
3) Alloys are made to impart shine and lustre to a metal
4) Alloys are made to change the physical properties such as melting point of metals.

Constituents of:
(i) Brass - copper and zinc
(ii) Bronze - copper and tin
(iii) Solder- lead and tin
(iv) Stainless steel - iron, nickel and chromium