Question

to show that size of the particles are extremely small​

Answer 1

To show that size of the particles are extremely small​

Things required:-

5 Test tubes filled with water upto 3/4th, a dropper, small crystals of KMnO4

Method:-

 In the first test tube , drop one small crystal of KMnO4 and then

cover the mouth of the test tube with thumb and shake the test tube

vigorously.Observe the color of the solution.

 After that with the help of a dropper,take out a few drops of

solution from it and pour into second test tube and cover its mouth to shake its contents

vigorously. Again observe the color of the solution. Repeat this procedure

for test tube no. 3,4 and 5 and observe the color change.

Observation:

 One can notice that the color of solution in the first test tube is deep pink. But it starts becoming less and less pink in the successive test tubes till the pink color is hardly visible.

Conclusion:

 The color of KMnO4 fades on dilution with water since

the particles of KMnO4 decrease gradually from first test tube to the last.

Therefore,one can conclude that the particles of matter are very, very

small and are not visible to the naked eye.