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

Ramu found that an iron sample in contact with sand is corroded. It is found that alkaline medium inhibits the rusting of iron. Explaln.

What is pig iron?

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

Friction is defined as the force which opposes the relative motion between two surfaces in contact. What is meant by banking of roads?

A farmer prepared 1% solution of copper sulphate using iron rod as the stirrer for preparing Bordeaux mixture. Next day he notices that the blue color almost disappeared and the iron get coated with reddish brown material. a) What is the reddish brown material deposited on the iron rod?

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.

What will be masses of samples b, c, and d?

What will be the change if silver rod is used instead of iron rod? What is the reason?

An unknown sample weighing 1.5 g was found to contain only Mn and S. The sample was completely reacted with oxygen and it produced 1.22 g of Mn(II) oxide and 1.38 g of SO_(3) .What is the simplest formula for this compound? (MnS)

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?