THESE NOTES ARE PREPARED ACCORDING TO JKBOSE SYLLABI IN SIMPLIFIED AND CONCISE PATTERN
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EXERCISES
Q. What are the advantages of using CNG and LPG as fuels?
Ans: The advantages of using CNG and LPG as fuels are :
i) They can be easily transported.
ii) They are easily available.
iii) They have low prices.
iv) They are clean fuels.
Q. Name the petroleum products used for surfacing of roads?
Ans: Bitumen, also known as asphalt is used for surfacing of roads.
Ans: The advantages of using CNG and LPG as fuels are :
i) They can be easily transported.
ii) They are easily available.
iii) They have low prices.
iv) They are clean fuels.
Q. Name the petroleum products used for surfacing of roads?
Ans: Bitumen, also known as asphalt is used for surfacing of roads.
Q. Describe how coal is formed of dead vegetation. What is this process called?
Ans: The process of formation of coal is called carbonisation.
Million of years ago, the earth had dense forests. These forests got buried under the soil and were compressed.
Under high pressure and high temperature, dead plants got slowly converted into coal.
Q. Fill in the blanks.
A. Fossil fuels are COAL, PETROLEUM and NATURAL GAS
B. The process of seperation of different constituents from petroleum is called REFINING
C. Least polluting fuel for vechiles is COMPRESSED NATURAL GAS
Q. Tick True or False against each of following statements.
A. Fossil fuels can be made in a laboratory: FALSE
B. CNG is more polluting fuel than petroleum: FALSE
C. Coke is almost pure form of carbon. TRUE
D. Coal tar is mixture of various substances: TRUE
E. Kerosene is not a fossil fuel: FALSE
Q. Explain why fossil fuels are exaustable natural resources.
Ans: The process of formation of coal is called carbonisation.
Million of years ago, the earth had dense forests. These forests got buried under the soil and were compressed.
Under high pressure and high temperature, dead plants got slowly converted into coal.
Q. Fill in the blanks.
A. Fossil fuels are COAL, PETROLEUM and NATURAL GAS
B. The process of seperation of different constituents from petroleum is called REFINING
C. Least polluting fuel for vechiles is COMPRESSED NATURAL GAS
Q. Tick True or False against each of following statements.
A. Fossil fuels can be made in a laboratory: FALSE
B. CNG is more polluting fuel than petroleum: FALSE
C. Coke is almost pure form of carbon. TRUE
D. Coal tar is mixture of various substances: TRUE
E. Kerosene is not a fossil fuel: FALSE
Q. Explain why fossil fuels are exaustable natural resources.
Ans: The formation of fossil fuels is a very slow process, they take millions of year to form from dead remains of living organisms of that time.
The amount of resources available for use is limited, thus fossil fuels are exhaustible natural resources.
Q. Describe Characteristics and uses of coke.
Ans: Characteristics:
It is a tough, black substance and pure form of carbon.
It produces little or no smoke.
Uses:
The amount of resources available for use is limited, thus fossil fuels are exhaustible natural resources.
Q. Describe Characteristics and uses of coke.
Ans: Characteristics:
It is a tough, black substance and pure form of carbon.
It produces little or no smoke.
Uses:
It is used for the extraction of metals.
It is used in the manufacture of steel.
Earlier it was used as source of energy in homes.
Q. Explain the process of formation of petroleum.
Ans: Petroleum was formed from organisms living under the sea.
As these organisms died, they got covered with layers of sand and clay.
Over millions of years in absence of air and high temperature and pressure, they transformed into petroleum.
Q. What are exaustable natural resources. Give examples.
Ans: Exaustable resources are the resources which are available in limited amount in nature.
Such resources will be exhausted by human activities.
Examples: Forests, coal, petroleum, minerals, wild life, natural gas etc.
Q. What are Inexaustable natural resources. Give examples.
Ans: Inexaustable resources are the resources which are available in infinite amount in nature.
Such resources will not be exhausted by human activities.
Examples: Sunlight, water, wind etc.
Q. Why natural gas is called a clean fuel?
Ans: Natural gas is called clean fuel because It burns completely and is non-toxic and non-poisonous.
Q. What are the uses of Coal?
Ans: Coal has many uses:
Ans: Natural gas is called clean fuel because It burns completely and is non-toxic and non-poisonous.
Q. What are the uses of Coal?
Ans: Coal has many uses:
i. It is used as a fuel in homes and industry.
ii. It is used in thermal power plants for generating electricity.
iii. It is used to make coal gas.
iv. It is used to make coke.
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