Question

a coman salt solution pases through filter paper leaving behind the residue when a strong beam of light is fosued on It. The path of ligth is not visible in the solutions answer the following question?
a) what name is given to the coman salt
b) why is the path of ligth not visible to this solution ​

Answer 1

a. NaCl

b. The path of light is not visible because it's particles are very small to scatter the beam of light