Question

Q1. B) Answer the following questions in one
a) What is meant by radioactivity?
Ans:
b) Write two uses of washing soda.
Ans:
c) Write the chemical formula of baking soda, bleaching poder and table salt.
Ans:
d) Define soap.
Ans:​

Answer 1

1. Radioactivity is the spontaneous emission of radiation in the form of particles or high energy photons resulting from a nuclear reaction. It is also known as radioactive decay, nuclear decay, nuclear disintegration, or radioactive disintegration.

2. Two important uses of washing soda:

(i) It is used in the manufacture of soap and glass.

(ii) It is used to remove the permanent hardness of water.

3. Chemical formula of baking soda is NaHCO₃.

Chemical formula of bleaching power is Ca(ClO)₂.

chemical formula of table salt is NaCl.

4.Soaps are cleaning agents that are usually made by reacting alkali (e.g., sodium hydroxide) with naturally occurring fat or fatty acids.