. Define adsorption. Why students can
read black board written by chalks?
Answers
Answer:
the digested food absorbed by the body flows through blood vessels into stream for the energy, growth of body are called absorprion. the student can read on black board written by chalks because white is opposite colour of black. If any dots of white colour printed on black things , then it highlight's.
Students are able to read black board written by chalks because particles of the chalk get adsorbed on the surface of black board.
Explanation:
When particles of a substance comes in contact with solid or liquid surface then they tend to get absorbed on the surface. This process is known as physical adsorption.
For example, when we write on a black board with the help of a chalk then particles of chalk tend to get adsorbed on the surface of black board. This is because particles of chalk are very tiny and hence they are able to get deposit on the surface of a black board.
As a result, we are able to see what is written on the black board.
Read more about adsorption:
https://brainly.in/question/7774484
https://brainly.in/question/3323839
#Learnwithbrainly