Take 2 ml of NaOH in a test tube, add two drops of phenolphthalein solution and then add few drops of dil. HCl to it. What is your observation with respect to colour?

Observe and prepare two questions while doillLg the following activity in the lab. Take 2 ml of dil. NaOH in a test tube and add on1e drop of phenolphthalein indicator. Mter that add dil. HCl solution to the above sc,lution drop by drop.

Take cold water and Hot water in two test tubes,Add one or two drops of phenolphthalein in it Drop equally sized Mg ribbon in it: Why did pink colour appear in that test tube so early?

Take cold water and Hot water in two test tubes, Add one or two drops of phenolphthalein in it Drop equally sized Mg ribbon in it: In which test tube pink colour occurred sharply?

Take cold water and Hot water in two test tubes,Add one or two drops of phenolphthalein in it Drop equally sized Mg ribbon in it: Which gas evolved out from both test tubes?

Add few drops of hibiscus indicator in soap solution. What do you observe ?

Take hot water and cold water in two test tubes. Add one drop of phenolphthalein to both of the test tubes. Then add magnesium ribbon of the same size to this test tubes. a) Which test tubes shows the sudden formation of pink colour? b) What is the reason for the sudden formation of pink colour? c) Which gas is formed? d) Write the equation for the chemical reaction.

Place a few granules of Zn metal in one test tube and add 10 ml of NaOH solution. What is the observation ?

Take cold water and Hot water in two test tubes,Add one or two drops of phenolphthalein in it Drop equally sized Mg ribbon in it: Write balanced equation for the above mentioned reaction.