Question

Which of the following is lustrous?
A.Steel furniture
B.Wooden furniture
C.Plastic chair
D.Football

Answer 1

Hint: Basically, the items of metals show luster because of which they are used in ornaments for example gold, platinum, silver etc. When something is lustrous, it reflects the light in a glossy way.

Complete step by step answer:
-Lustre is the way by which the light interacts with the surface of a crystal, rock or mineral. Many terms are used to describe the property of lustre such as earthy, metallic, greasy, silky etc.
-We see so many objects around us and all these objects are invented or discovered for a particular purpose. All the objects can roughly be classified in many types and one such type is lustre. Now, let’s discuss all the types.
1.Colour- Many materials are classified on the basis of color. For example, red being the color of danger can be depicted by using any object of that colour, say a flag or bulb.
2.Texture: Wherever the surface of the material is being used, then the classification based on texture is followed. For example, in the process of abrasion, materials with rough surface such as sandpaper are used whereas while making toys, soft materials such as wool, rubber, plastics are used.
3.Lustre- The items of metal show the property of lustre. For example steel furniture, gold, platinum etc.
4.Shape-Materials can be classified on the basis of shape. For example objects that are round in shape such as marbles, cricket ball etc.
Therefore, among the given options, steel furniture is lustrous in nature.

Hence, option A is correct.

Note:
The lustre of metal is due to the presence of mobile i.e. free electrons in it. Moreover, lead has a dull lustre and is a dense, ductile and highly malleable metal with poor electrical conductivity. It loses its lustre due to the corrosion of its surface.