Question 1

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Accepted Answer

Oil layer is above on water layer because of API gravity. API gravity is a measure of the density of petroleum liquid compared to water. If a petroleum liquids API gravity is greater than 10, it is light, and floats on top of water. If the API gravity is less than 10, it is heavy, and sinks in water.

Question 2

State whether the statement is true of false. Rewrite the false statement correctly.The most accepted theory about the origin of petroleum is believed to be of organic origin.

Accepted Answer

Thus current theory holds that most petroleum is formed by the thermal maturation of organic matter - An Organic Origin generated the vast reserves (pools) of oil and gas. Organic Hypothesis: There are a number of compelling reasons that support an organic development hypothesis.hence , the given statement is true .

Question 3

The inorganic origin of petroleum is indicated by the fact that

Accepted Answer

Abiogenesis-inorganic origin of petroleum, is an oldest theory which suggests that petroleum comes from the underneath part of the mantle very long time ago before the existence of life on earth it can be  Carbon and hydrocarbon can combine by absorption of solar energy to give hydrocarbons.

Question 4

Petroleum is formed from:

Accepted Answer

Petroleum (also known as crude oil or simply oil) is a fossil fuel that was formed from the remains of ancient marine organisms. Millions of years ago, algae and plants lived in shallow seas. After dying and sinking to the seafloor, the organic material mixed with other sediments and was buried.

Question 5

The Petroleum Conservation Research Association (PCRA) is an organization established in India in:

Accepted Answer

The Petroleum Conservation Research Association (PCRA) is an organization established in India in 1978. It helps the government in proposing policies and strategies aimed at reducing India's dependency on oil, in order both to save money and to reduce the environmental impact of oil use.

Question 6

Natural gas is found as:

Accepted Answer

Natural gas is found in deep underground rock formations as a layer above petroleum oil deep underground or associated with other hydrocarbon reservoirs in coal beds and as methane clathrates. Petroleum is another resource and fossil fuel found close to and with natural gas. Thus, option C is correct.

Question 7

The boiling range of diesel is :

Accepted Answer

Diesel fuel is a
mixture of hydrocarbons with boiling points in
the range of 150 to
380°C which are obtained from petroleum.

Question 8

A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is:

Accepted Answer

Kerosene is a liquid and liquids have no fixed shape but have a fixed volume.

Question 9

The layer containing petroleum oil and gas is:

Accepted Answer

The density of gasoline ranges from 0.71–0.77 kg/L, where as that of water is 1kg/L, oil is less dense than water so it will "float" on water. Gas is less dense than both and will float to the top. higher densities having a greater volume of aromatics. Since gasoline floats on water, water cannot generally be used to extinguish a gasoline fire unless used in a fine mist. The petroleum products will separate by density.

Question 10

Petroleum oil is found:

Accepted Answer

Petroleum oil is found deep underground in seabeds.

Important questions on Petroleum And Natural Gas

We see oil layer above water layer

Petroleum liquids API gravity is greater than 10

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

Assertion is correct but Reason is incorrect

Both Assertion and Reason are incorrect

State whether the statement is true of false. Rewrite the false statement correctly. The most accepted theory about the origin of petroleum is believed to be of organic origin.

True

False

The inorganic origin of petroleum is indicated by the fact that

Its constituents can be separated by fractional distillation

Carbon and hydrocarbon can combine by absorption of solar energy to give hydrocarbons

Petroleum contains traces of chlorophyll

Oil fields are located with the help of seismograph

Petroleum is formed from:

insects

wild animals

organisms in sea

domestic animals

The Petroleum Conservation Research Association (PCRA) is an organization established in India in:

1968

1988

1948

1978

Natural gas is found as:

layer above hot-beds

layer below petroleum oil deep underground

layer above petroleum oil deep underground

layer below the glacier

The boiling range of diesel is :

300oC to 350oC.

400oC to 450oC.

400oC to 550oC.

200oC to 450oC.

A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is:

Krypton

Kerosene

Carbon steel

Carbon dioxide

The layer containing petroleum oil and gas is:

below water

between water and sand

below sand

above the water

Petroleum oil is found:

deep underground (sea beds)

in mountains

in glacier

in river

More important questions

State whether the statement is true of false. Rewrite the false statement correctly.
The most accepted theory about the origin of petroleum is believed to be of organic origin.

300 $^{o}$ C to 350 $^{o}$ C.

400 $^{o}$ C to 450 $^{o}$ C.

400 $^{o}$ C to 550 $^{o}$ C.

200 $^{o}$ C to 450 $^{o}$ C.