Question

(a) What is an alloy? How is an alloy made?
(b) What elements are present in steel? How are the properties of steel different from those of pure iron?
(c) Give the constituents and one use of brass.

Answer 1

Answer:

1)Alloy us the homogeneous mixture of two or more molten metals.

By melting metals, alloy is made.

2)Steel is an alloy of iron. It is composed of iron with 0.1 to 1.5 per cent carbon. Iron is not suitable to be used in its pure form because pure iron is very soft and elongates easily when hot. Alloying iron with 0.1 to 1.5 per cent carbon changes the properties of pure iron.

3)Brass is the alloy if copper and tin.

It is used in making statues.

Answer 2

Answer:

1) Alloy us the homogeneous mixture of two or more molten metals.

By melting metals, alloy is made.

2) Steel is an alloy of iron. It is composed of iron with 0.1 to 1.5 per cent carbon. Iron is not suitable to be used in its pure form because pure iron is very soft and elongates easily when hot. Alloying iron with 0.1 to 1.5 per cent carbon changes the properties of pure iron.

3) Brass is the alloy if copper and tin.

It is used in making statues