Question

Answer the following :-
1. Define valency?
2. What are indicators?​

Answer 1

Answer:

Explanation:

Valency is defined as combining power of an element with other atom to form chemical bond. Valency refers to electron in outer shell of an atom. Example, Na(2,8,1) Valency of Na is 1

Acid - Base indicators (also known as pH indicators) are substances which change colour with pH. They are usually weak acids or bases, which when dissolved in water dissociate slightly and form ions. Consider an indicator which is a weak acid, with the formula HIn. ... The equilibrium solution has the colour A

Answer 2

Answer:

Valency: The valence or valency of an element is the measure of its combining capacity with other atoms when it forms chemical compounds or molecules.

Indicators: An indicator shows one color in an acidic medium and different colors in a basic medium so that they are called indicators.