LIVE Course for free

Rated by 1 million+ students
Get app now
0 votes
in Chemistry by (29.8k points)

A group of students took an old shoe box and covered it with a black paper from all sides. They fixed a source of light (a torch) at one end of the box by making a hole in it and made another hole on the other side to view the light. They placed a milk sample contained in a beaker/tumbler in the box as shown in the Fig.2.4. They were amazed to see that milk taken in the tumbler was

illuminated. They tried the same activity by taking a salt solution but found that light simply passed through it? 

(a) Explain why the milk sample was illuminated. Name the phenomenon involved. 

(b) Same results were not observed with a salt solution. Explain. 

(c) Can you suggest two more solutions which would show the same effect as shown by the milk solution?

1 Answer

0 votes
by (128k points)
selected by
Best answer

(a) Milk is a colloid and would show Tyndall effect. 

(b) Salt solution is a true solution and would not scatter light. 

(c) Detergent solution, sulphur solution.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.