Question

D. Answer the following questions in brief.
1. Define the following:
(a) Natural materials
(b) Transparent materials
2.
Name any three materials that are (i) transparent (ii) opaque in nature.
3.
Which state of matter (i) can (ii) cannot easily change its shape and volum
Why?
4.
Why do materials diffuse into each other?
5.
Define the term ‘solubility'. How does it change on increasing the temperat
of water?
6.
Name three materials that are (i) soluble (ii) insoluble in water.​

Answer 1

Answer:1.(a) Materials that are obtained from nature are called Natural materials. (b) Materials that can be seen clearly opposite of the object is called Transparent Materials.

2.(i)Clear glass, Transparent paper,Water(ii) Wood, Gold, Silver.

3.(i)Liquid and Gas(ii) Solid.

4.Ans:Because they have different shapes, sizes, volume.

5.The materials that soluble in liquid is called soluble materials. Materials that are not soluble in liquid is called insoluble materials.Because of the heat of water.

6.(i)Salt,Sugar,Glycerine.(ii)Petrol,Deisel,Vegetable oil.