Tag: coal

Questions Related to coal

The major constituent of natural gas is :

chemistry rocks and minerals coal petroleum non-renewable sources of energy

  1. methane

  2. propane

  3. butane

  4. hexane

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Correct Option: A
Explanation:

Answer:- (A) Methane 
Natural gas is primarily composed of methane, but also contains heavier hydrocarbons. It also contains small amounts of nitrogen, carbon dioxide, hydrogen sulphide and trace amounts of water.

The dead aquatic organisms that were buried under the sand and clay of the sea bed, were converted to petroleum owing to:

chemistry rocks and minerals coal petroleum non-renewable sources of energy

  1. absence of air

  2. high temperature

  3. high pressure

  4. all of the above

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Correct Option: D
Explanation:

The dead aquatic organisms that were buried under the sand and clay of the seabed, were converted to petroleum owing to the absence of air, high temperature, and high pressure.

Which of the following is used as fuel in an electric generator?

chemistry rocks and minerals coal petroleum non-renewable sources of energy

  1. Petrol

  2. Diesel

  3. Kerosene

  4. CNG

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Correct Option: B
Explanation:

A diesel generator is the combination of a diesel engine with an electric generator(often an alternator) to generate electrical energy. 

Petroleum is formed under the earth's crust by chemical changes in:

chemistry rocks and minerals coal petroleum non-renewable sources of energy

  1. Vegetable matter

  2. Inorganic matter

  3. Animal matter

  4. Both vegetable and animal matter

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Correct Option: D
Explanation:

Petroleum which is also known as crude oil  is a fossil fuel that was formed from the remains of  marine organisms and plant wastes (vegetable).

Millions of years ago, algae and plants lived in shallow areas  seas. After dying and sinking to the seabottom, the organic material mixed with other sediments and was buried. Over millions of years under high pressure and high temperature, the remains of these organisms transformed into what we know today as fossil fuels by the various chemical process . Coal, natural gas, and petroleum are all fossil fuels that formed under similar conditions.

Hence option D is corrrect.

Arrange the following in a proper sequence for the extraction of petroleum.
(a) Processing of crude oil to remove heavy oil.
(b) Heating of the crude oil containing pure mixture of hydrocarbons over a specific range of temperature.
(c) Separation of constituents by fractional distillation.
(d) Purification of crude oil containing salt water.
(e) Drilling of the oil through the various layers under the earth's surface.

chemistry rocks and minerals coal petroleum non-renewable sources of energy

  1. ebadc

  2. ecabd

  3. eadbc

  4. eabcd

Show answer
Correct Option: C
Explanation:

The correct sequence is :
(i) Drilling of the oil through the various layers under the earth's surface.
(ii) Processing of crude oil to remove heavy oil.
(iii) Purification of crude oil containing salt water.
(iv) Heating of the crude oil containing pure mixture of hydrocarbons over a specific range of temperature.
(v) Separation of constituents by fractional distillation.

Petroleum is:

chemistry rocks and minerals coal petroleum non-renewable sources of energy

  1. lighter than water and soluble in it

  2. heavier than water and insoluble in it

  3. lighter than water and insoluble in it

  4. heavier than water and soluble in it

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Correct Option: C
Explanation:

Petroleum is lighter than water. It has less density, so is insoluble in water.

Which of the following statements is correct?

chemistry rocks and minerals coal petroleum non-renewable sources of energy

  1. LPG is a mixture of butane and propane.

  2. LPG is liquefied methane.

  3. LPG is liquefied propane.

  4. LPG is a mixture of methane and ethane.

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Correct Option: A
Explanation:
Liquified petroleum gas or liquid petroleum gas (LPG or LP gas), also referred to as simply propane or butane are flammable mixtures of hydrocarbon gases used as fuel in heating appliances, cooking equipments and vehicles. LPG is a mixture of mainly liquefied butane and propane.

While leakage in L.P.G. gas cylinders, gas which gives fowl smell is:

chemistry rocks and minerals coal petroleum non-renewable sources of energy

  1. butane

  2. propane

  3. methane

  4. ethyl mercaptan

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Correct Option: D
Explanation:

It is 'ethyl mercapton' which is responsible for the pungent smell.

In the refining of petroleum, in a fractionating column, the principle used is _______.

chemistry world energy needs coal petroleum non-renewable sources of energy

  1. difference in melting point

  2. difference in boiling point

  3. difference in freezing point

  4. None of these

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Correct Option: B
Explanation:

A fractionating column is an essential thing which is used in distillation of liquid mixtures so as to separate the mixture into its component parts, or fractions, based on the differences in their boiling temparatures. Fractionating columns are used in small scale laboratory distillation process as well as for large scale industrial distillations.

Hence option B is correct.

Which step is not present in the extraction of petroleum?

chemistry world energy needs coal petroleum non-renewable sources of energy

  1. Pumping

  2. Drilling

  3. Distillation

  4. Seismic survey

Show answer
Correct Option: C
Explanation:

Procedure for extraction of petroleum:

i) Locating the oil field or seismic survey
ii) Drilling
iii) Oil extraction and recovery ( involves pumping)
Distillation is used for extracting different petroleum products like petrol, diesel, natural gas from petroleum.
Hence, the correct option is $C$.