notes of CBSE class 10 chapter 2 chemistry acids, bases and salts
Answers
CBSE Class 10 Science Notes Chapter 2 Acids Bases and Salts
Indicators: Indicators are substances which indicate the acidic or basic nature of the solution by the colour change.
Types of Indicator: There are many types of indicators. Some common types of indicators are:
1. Natural Indicators: Indicators obtained from natural sources are called Natural Indicators. Litmus, turmeric, red cabbage, China rose, etc., are some common natural indicators used widely to show the acidic or basic character of substances.
Litmus: Litmus is obtained from lichens. The solution of litmus is purple in colour. Litmus paper comes in two colours- blue and red.
An acid turns blue litmus paper red.
A base turns red litmus paper blue.
Turmeric: Turmeric is another natural indicator. Turmeric is yellow
Answer:
Indicaters :- indicators are the substances which indicates the presence of acid and base in a solution.