How do sodium,magnesium,iron and copper react with water?Arrange these metals in order of decreasing reactivity with the help of these reactions.

How do sodium,magnesium,iron and copper react with oxygen?Arrange these metals in order of decreasing reactivity with the help of these reactions.

Samples of four metals A,B,C and D were taken and added to the following solutions one by one.The results obtained have been tabulated as follows. Use the table above to answer the following questions about metals A,B,C and D. (i)Which is the most reactive metal? (ii)What would you observe if B is added to a solution of copper (II) sulpahate? (iii)Arrange the metals A,B,C and D in the order of decreasing reactivity.

The mass per unit volume of a substance is called density. (Density = mass/volume). Arrange the following in order of increasing density- air, exhaust from chimneys, honey, water, chalk,cotton and iron.

Illustrate how copper metal can give different products on reaction with HNO_3 .

Sodium form a crystalline ionic solid with dihydrogen. The solid is non-volatile and non-conducting in nature. It reacts violectly with water to produce dihydrogen gas. Write the formula of this compound and its reaction with water. What will happen on electroysis of the melt of this solid?

Arrange the following set of compound in order of their decreasing reactivity with an electrophile E^(oplus) . Chlorobenzene, 2, 4 dinitro chlorobenzene, p-nitrochloro benzene.