If you touch at elbow, you get a shock like feeling. Why?

If you touch your elbow. You get a shock like feeling. Why?

Take some water in a test tube and add concentrated H_2SO_4 to it. Shake the test tube well. If you touch the bottom of the test tube, you feel it as hot. Now, instead of H_2SO_ 4 , if you add NaOH pellets to water in another test tube and touch the bottom, what do you observe?

How do you feel when you touch “Touch me not” plant ? Write your feelings ?

Think why do you eat ?

If you want to know about "Actions of gases in lungs". What questions you would like to ask?

If you want to develop social forestry in your village. Which type of plants would you like to grow? Why?

The changes like chicks came out of eggs, blossoming flowers etc, are very pretty to see. List out such changes around you which make you feel happy on observation.

Water is added to quick lime in a beaker and you touch the bottom of the beaker what do you notice ? What is the reason ?