Iron is a metal which corrodes fast.
What are the factors that favour the corrosion of iron?
In coastal regions, copper nails are preferred to iron nails. What could be the reason?
Can you suggest some measures to prevent the corrosion of iron?

What are the changes that can be observed with the iron rod and the colour of copper sulphate solution?

Ramu found that an iron sample in contact with sand is corroded.What is corrosion?

Iron metal is largely used for making ships. ln the sea, ship is in contact with saline water. Destruction of iron becomes quicker in saline medium. a)What is such processes generalty called? b). Destruction of iron can be prevented by coating with zinc, Explain the chemical reaction by-which iron gets protected. Give equations.

a) What are the changes that can be observed with the iron rod and the color of copper sulphate solution if iron rod is dipped in copper sulphate solution? b) Write the equation of the oxidation and reduction reactions. c) What will be the change if silver rod is used instead of iron rod? What is the reason?

A long resistance wire is stretched between two iron nails. A battery of 2V is applied across the wire. One end of a torch bulb is connected to nail and other end is made in contact as shown in figure. - If this wire slides over the resistance wire from nail 1 to nail 2, what happens to the brightness of the bulb.

A long resistance wire is stretched between two iron nails. A battery of 2V is applied across the wire. One end of a torch bulb is connected to nail and other end is made in contact as shown in figure. - What happens to the reading, if we change 2V with 3V during the time of reading

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?

Electroplating is one of the practical utilities of electrolysis .Copper can be coated on an iron bangle by this process. Which metal is connected to negative terminal of the battery in this process ?

The equation of reaction with CuSO_4 solution and iron nail is given below. Fe+ CuSO_4 rarr FeSO_4 + Cu a) Write the reduction reaction taking place here? b) Fe will displace Cu from CuSO_4 solution. What is the reason?