21.
An alloy used in making heating elements for electric heating device is

23.
The important metal used with iron to produce stainless steel is

24.
Which of the following metals form an amalgam with other metals ?

25.
________ gives hardness to stainless steel.

26.
Bauxite is used as raw material by which industry ?

27.
Brass contains

28.
Brass is a

29.
Brass is an alloy of