Question

X, Y and Z are three types of material. The material X and Y can break into pieces easily when hit with an object
but material Z does not break easily. The material X is used in windows of bathroom whereas material Y is used in
windows of drawing room. Material Z is used for making doors and almirahs.

Answer 1

Answer:

(a) Ground glass.

   It is a translucent material.

(b) Clear glass.

   It is a transparent material.  

(c) Wood.

   It is an opaque material.  

(d) X is a translucent material, we can not see clearly through it whereas, Y is a transparent material, we can see clearly through it.