Question

Vegetable oil has been known from antiquity. No household can get on without it, for it is used

in cooking. Perfumes may be made from the oils of certain flowers. Soaps are made from

vegetable and animal oils.

To the ordinary man, one kind of oil may be as important as another. But when the 5 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 has changed the life of the common man. When it is

refined into petrol it is used to drive the internal combustion engine. To it we owe the existence

of the motor car, which has replaced the private 10 carriage drawn by the horse. To it we owe

the possibility of flying. It has changed the methods 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 15 is very slippery, it is used for lubrication. Two metal surfaces rubbing together

cause friction and heat. But if they are separated by a thin film of oil, the friction and 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.

The existence of oil wells has been known for a long time. Some of the Indians of North

America used to collect and sell the oil from the wells of Pennsylvania. No one, however, seems

to have realised the importance of this oil until it was found that paraffin oil could be made

from it. This led to the development of the wells and to the making of enormous profits. When

the internal combustion engine was invented, oil became of 25 worldwide importance.

-Extracted from ‘Oil by G.C. Thornley (adapted)

Read the passage mentioned above and answer the questions that follow:

i. DONE

ii. Where does the mineral oil come from?

iii. Which is the oldest known oil?

iv. DONE

v.DONE

JUST ANSWER ii.,iii.,

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Answer 1

which class plz tell me

Explanation:

MARK ME AS BRAINLIST