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: 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: Write balanced equation for the above mentioned reaction.

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.

Cold water is taken in one test tube and hot water in another one. Mg ribbon with same size is dropped in each of the test tube: In which test tube, hydrogen is formed with greater speed?

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?

A red solid is insoluble in water. However, it becomes soluble if some Kl is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of test tube. The red solid is