Did you ever observe this phenomenon in the cinema halls?

If you add a drop of KMnO4 solution to a large quantity of water what do you observe and what phenomenon is involved in this ?

Do you observe diffusion ?

Have you ever observed details in the prescription ?

Did you observe any precipitate in the reaction ?

Have you ever observed the duration of anger ?

What change did you observe in the thermometer in the given experiment ? What result you will get , if you perform this experiment with dry seeds ?

What change did you observe in the thermometer in the given experiment ? Where does the heat come from ?

What change did you observe in the thermometer in the given experiment ? What are the apparatus used in this experiment ?

Have you ever observed any water pollution in your area? What measures would you suggest to control it?