Question

How can we explain the acidic character of H2CO3 , CO2 , SO3 and basic character of Na2CO3, NH3 , CaO etc?​

Answer 1

Answer:

with the help of litmus paper

Explanation:

if blue litmus paper is dipped into this things ......H2CO3 , CO2 , SO3..... then blue litmus paper will turn red and hence the acidic character of this as shown

if if the red litmus papers dipped into this things.... Na2CO3, NH3, CaO... if the red litmus paper turns into blue color hence the basic character of this are proved