Take water in 4 different beakers and add a small piece of sodium,lead,iron and copper in each: In which all solutions gas bubbles will be formed? Which gas is formed?

Take water in 4 different beakers and add a small piece of sodium,lead,iron and copper in each: Which solution will turn pink on adding phenolphthalein? Why?

Take water in 4 different beakers and add a small piece of sodium,lead,iron and copper in each: Write the chemical equation between this metal and water.

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?

Take a few sodium carbonate in a test tube and let it react with dilute sulphuric acid. The gas formed is passed through lime water. What do you observe? Which gas is formed? Write the chemical equation.

Take 25 ml water in a beaker and the pass electricity through it. Then add little sulphuric acid in it: Which type of ion formed more when sulphuric acid is added in water.

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?