Free Coal and Petroleum 03 Practice Test - 8th Grade 

Question 1

Select the fuel that has high calorific value, burns readily and can be used as fuel in homes and automobiles.

A. Petroleum
B. Paraffin wax
C. Kerosene oil
D. Natural gas

SOLUTION

Solution : D

Natural gas is stored under high pressure as Compressed Natural Gas (CNG). CNG is used for power generation. It is also a less polluting fuel used for automobiles. The great advantage of CNG is that it can be used directly for burning, in homes and factories. It also has a higher calorific value than most of the other fuels.

Question 2

Identify the fibres that can be manufactured using petrochemicals.

A. Nylon
B. Polyester
C. Acrylic
D. Silk

SOLUTION

Solution : A, B, and C

The substances which are obtained from petroleum and natural gas are called petrochemicals. Petrochemicals are used in the manufacture of detergents, synthetic fibres, plastics etc. 
Nylon, polyester and acrylic are examples of synthetic fibres that are manufactured using petrochemicals.

Question 3

Identify the gas that is generally produced when coal is burnt in the presence of a lot of air.

A.

Carbon monoxide

B.

Sulphur dioxide

C.

Carbon dioxide

D.

Nitrogen dioxide

SOLUTION

Solution : C

Coal is mainly composed of carbon. When coal is burnt in the presence of air, carbon reacts with oxygen gas that is present in air (atmosphere) and produces carbon dioxide gas (CO2).

When carbon (coal) is burnt in limited presence of oxygen, carbon monoxide (CO) is produced.

Question 4

Which of the following are the uses of bitumen?

A. Paint
B. Candles
C. Road surfacing
D. Motor fuel

SOLUTION

Solution : A and C

Bitumen is one of the products formed from petroleum. This is used in paints and road surfacing. The primary use (70%) of asphalt/bitumen is in road construction, where it is used as the glue or binder mixed with aggregate particles to create asphalt concrete.

Question 5

We get pungent smell when there is LPG leakage even though natural gas is odourless. Identify the proper reason for this smell.

A. LPG gas undergoes oxidation and produces a pungent smell.
B. A chemical with a pungent odour is added in LPG/CNG to detect leakage.
C. LPG gas reacts with walls of the cylinder to produce a pungent smell. 
D. Compressed LPG gas has a pungent smell.

SOLUTION

Solution : B

Any accidental leakage can cause an explosion. If the gas leaks in any closed space such as kitchen, etc. then on lighting a matchstick, an explosive mixture will burst into flame causing fire in the house and can cause serious burn injuries.

In order to prevent this, LPG companies add a chemical ethyl mercaptan which helps in detection of the leakage because of the smell imparted.

Question 6

Which of the following is also known as the 'black gold'?

A.

Petroleum

B.

Coal

C.

Natural gas

D.

CNG

SOLUTION

Solution : A

Petroleum has great commercial importance, due to which it is also called the 'black gold'. Many useful substances are obtained from petroleum. These are termed as 'Petrochemicals'. These are used in the manufacture of detergents, fibres (polyester, nylon, acrylic, etc.), polythene and other manmade plastics. 

Question 7

Which petroleum product is used in place of coal tar for metalling the roads?

A.

Lignite

B.

Bitumen

C.

Coal gas

D.

Peat

SOLUTION

Solution : B

Bitumen, a petroleum product, is used in place of coal-tar for metalling the roads. It is a very good adhesive. It sticks well to the sub layers. Bitumen is a black, oily, viscous material that is a naturally occurring organic byproduct of decomposed organic materials. The primary use (70%) of asphalt/bitumen is in road construction, where it is used as glue or binder mixed with aggregate particles to create asphalt concrete.

Question 8

Which of the following is the use of coal gas?

A. Street Lighting
B. Mosquito repellent
C. Manure formation
D. Paints

SOLUTION

Solution : A

Coal gas is CO2 & CO. It is used as fuel and earlier in the year 1810 it was used for street lighting in London.

Whereas, mosquito repellent generally contains propane, petrol is used for the manufacture of paint and manure formation requires ammonia. 

Question 9

Petroleum is also known as _________.

A.  black diamond
B. black gold
C. black platinum
D. silver oil

SOLUTION

Solution : B

Many useful substances are obtained from petroleum and natural gas. These are termed as petrochemicals. These are used in the manufacture of detergents, fibres (polyester, nylon, acrylic etc.), polythene and other man-made plastics. Hydrogen gas obtained from natural gas, is used in the production of fertilisers (urea). Due to its great commercial importance, petroleum is also called ‘black gold’.

Question 10

Identify the region(s) in India where vast reserves of natural gas are found.

A. Assam
B. Andhra Pradesh
C. Gujarat
D. Maharashtra

SOLUTION

Solution : A, B, C, and D

Natural gas is a fossil fuel formed million years ago along with petroleum by the dead microscopic organisms which got buried along with organic matter under the sand and mud. These organisms undergo anaerobic fermentation and get converted into natural gas. In India, natural gas is available in various parts of the country such as Assam, Gujarat, Andhra Pradesh, Maharashtra.
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