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 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.

5ml water is taken in 3 test tubes. Copper, sodium and magnesium of equal mass are dropped in different test tubes. Test tubes having copper and magnesium are heated: Write the observations in the heated test tubes.

5ml water is taken in 3 test tubes. Copper, sodium and magnesium of equal mass are dropped in different test tubes. Test tubes having copper and magnesium are heated: Write the equations for the reaction in the test tube in which sodium is dropped.

5ml water is taken in 3 test tubes.Copper, sodium and magnesium of equal mass are dropped in different test tubes. Test tubes having copper and magnesium are heated: Arrange these metals in the decreasing order of their reactivity.

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?

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?

The solutions of ZnSO4 , FeSO4, CuSO4 and AgNO3 are taken in four different test tubes. Suppose, an iron nail is kept immersed in each one: In which test tube the iron nail under goes a colour change?, What is the reaction taking place here?