MCQ
DIRECTIONS: Read the passage(s) given below and answer the questions that follow. Passage - Materials usually look different from each other. Wood looks very different from iron. Iron appears different from copper or aluminium. At the same time there may be some similarities between iron, copper and aluminium that are not their in wood. An iron smith, look out for freshly cut surfaces of metal rods to see if they have lustre. What other process can be used to see if a material has lustre or not?
- AHeat the material.
- BWash the material with water.
- ✓Rub the surface of material with sand paper.
- DAllow the material to remain exposed to air for some time.