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: 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: Arrange these metals in the decreasing order of their reactivity.

5ml AgNO_3 is taken in a test tube and a co-pper rod is dipped in ti: Write the equations of the oxidation and reduction reactions.

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 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.

Write your observation Test tube 2 : ……………

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.

5 ml, AgNO_3 is taken in a test tube and a copper rod is dipped in it. a) Identify the changes occuring with the copper rod and the solution? . b) Complete the equation of the reaction. Cu + 2AgNO_3 gives ... + ...... c) Write the equations of the oxidation and reduction reactions.

Some apparatus and chemicals are given. Zn, Mg, dilute HCl, CaCO_3 test tube, water. Write the equations for the chemical reactions.