Question

What change would Rahul observe on repeating the above experiment by replacing water with vegetable oil in the tin can and why?​

Answer 1

Read the following passage carefully and answer the questions that follow: <br> Vegetable oil has been known since ancient times. No house - hold can get on without it , for it is used in cooking Perfumes may be made from the oil of certain flowers . Soaps are made from vegetable and animal oils. <br> To the ordinary man, one kind of oil may be as important as another . But when the politician or the engineer refers to oil , he almost always means mineral oil, the oil that drives tanks , aeroplanes and warships , motor - cars and diesel locomotives , the oil that is used to lubricate all kinds of machinery. This is the oil that is used to lubricate all kinds of machinery . This is the oil that has changed the life of the common man. <br> When it is refined into petrol it is used to drive the internal combustion engine. To it we owe existence of the motor - car, which has replaced the private carriage drawn by the horse. To it we owe the possibility of flying It hs changed the method of warfare on land and sea. This kind of oil comes out of the earth. Because it burns well, it is used as fuel and in some ways it is superior to coal in this respect . Many big ships now burn oil instead of coal . Because it burns brightly , it is used for illumination , countless homes are still illuminated with oil burning lamps . Because it is very slippery , it is used for lubrication . Two metal surface rubbing together cause friction and heat . But if they surfaces rubbig together cause friction and heat . But if they are separated by a thin film of oil , the friction and head heat are reduced. No machine would work for long if it were not properly lubricated . The oil used for this purpose must be of the correct , thickness , if it is too thin it will not give sufficient lubrication ,and if it is too thick it will not reach all parts that must be lubricated. <br> How is vegetable oil of utmost importance for every household ?

Answer 2

Rahul checks by repeating the above test by substituting vegetable oil for water in a tin can:

• The tin cans used to store food, are made by electroplating tin on iron.
• Due to the low carbon content of the tin rather than iron, food is protected and decomposed on contact with iron.
• Iron, as it is very powerful, is used in the construction of bridges and in vehicles.
• However, it has a tendency when it starts to rust and then causes rust.
• Tins work less than iron.
• The metal coating prevents food from coming into contact with the metal and thus prevents corrosion or corrosion.
• The electroplating of tin is made of metal to make cans used to store food because the tin is less effective than iron.
• The metal coating prevents the food from coming into contact with the iron and thus prevents it from spoiling.
• Due to the low carbon content of the tin rather than iron, food is protected and decomposed on contact with iron.
• Iron, as it is very powerful, is used in the construction of bridges and in vehicles.
• However, it has a tendency when it starts to rust and then causes rust.
• Thus, adhesive zinc is applied to the metal to prevent corrosion and corrosion.