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.

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?

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: Why did pink colour appear in that test tube so early?

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.

Sodium reacts with water. a. Identify the gas evolved in the reaction. b. If two drops of phenolphthalein is added to the water, what will be colour change of the resultant solution? Explain the reason.

Take 10 mL distilled water in a test tube and take the same volume of hard water in another test tube. Add a few drops of soap solution to both the test tubes and shake well. Do both the test tubes contain the same quantity of foam? Which test tube contains more foam? What do you infer?

The experiments conducted by two students are given below. Experiment 1: 2mL of sodium thiosulphate solution is taken in a test tube, heated and to it 2 mL of HCl solution is added. Experiment 2: 2 mL of sodium thiosulphate solution is taken in a test tube and to it 2 mL of HCl solution is added. Write the balanced equation for the reaction.

Take equal quantities of dil HCI in four test tubes. Drop Mg, Zn, Fe,Cu in each test tube. Watch carefully: Write balanced equation for each reaction.