Admissions 2025-26
Properties of Materials
Question 1:
How Will You Separate Solids (Dirt or Salt) From the Liquid (Water)?
Answer:
The following methods can be used to separate dirt or salt from water:
- Salt can be separated from water by the process of evaporation.
- Dirt can be separated by the process of sedimentation (settling of dirt particles at the base of the container) and decantation.
- Alum can be mixed with water to increase the rate of sedimentation and separate clear water.
Question 2:
Glass Is Fragile but Still Used to Make Windows on a Large Scale. Why Do You Think So?
Answer:
Glass is used to make windows due to following reasons:
- It is cheaper than other materials.
- It is transparent and allows light to pass through it.
- It is convenient to clean the glass.
Question 3:
Switches in the Electric Boards Are Made of Plastic Instead of Wood. Why?
Answer:
Though both wood and plastic are insulators, plastic is used to make electric switches due to the following reasons:
- Plastic is more durable than wood.
- It can be heated and moulded into different shapes, unlike wood.
- Thermosetting plastic used to make switches do not catch fire easily.
- Plastic does not absorb water.
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Admissions Open for 2025-26
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