Question

Question 7

Write the uses of the following substances -

(i) Teflon (ii) Dye

Answer 1

(a) Teflon:

• It is used in making waterproof fabric.

• It is used in making non-stick cookware.

• It is used for coating medical appliances (surgical devices).

• Due to its high resistance towards corrosion, it is used for coating the lining of laboratory appliances.

(b) Dye:

1. They are used for colouring cloth and hair.

2. Fluorescent colours are used to make street boards that are visible at night.

3. Dyes are used to polishing leather shoes, purses, and chappals.