Question

Take 2-3 crystals of potassium permanganate and dissolve them in 100ml of water
Take out approximately 10 mL of this solution and put it into 90 mL of clear water
Take out 10 mL of this solution and put it into another 90 mL of clear water.
Keep diluting the solution like this 5 to 8 times.
Is the water still coloured ? 10 mL 10 mL 10 ml 100 ml. 100 ml 100 ml 100 ml 100 ml
Fig. 1.2: Estimating how small are the particles of matter. With every dilution, though the colour becomes light, it is still visible. under Aim, material required, experiment, observation, result, precautions​

Answer 1

Explanation:

Observation: The pink colour of the solution does not altogether disappear and some always persists even when the solution is very dilute

Conclusion: one crystal of pottasium permanganate which seems to be very small in size is actually made up of large number of tiny particles

HOPE IT WILL HELP YOU

Answer 2

you have done a mistake that you have to take the focal length as meters. correct answer is +1D

keep it up . thak uou for your response :-)

I am very angry about those who give irrevelent answers.