Source of Energy | Solved Questions:
SSLC Science Solved Questions/Model Questions and Answers (Q&A) on the Lesson: Source of Energy for the SSLC English Medium students have been updated in this post below. The students of SSLC can make use of this Online Study Package to get good scores in the SSLC examinations.
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SOURCE OF ENERGY
One Marks Questions
Answer: Compressed Natural Gas.
Answer:
i) It maintains an unpolluted environment.
ii) Reduces the carbon dioxide content in the atmosphere.
Answer: Disadvantages are air pollution and acid rain which affect soil and water.
Answer:
i) Fossil fuels will run our or will not be replenished
ii) They are non-renewable sources of energy
Answer:
(i) Used for production and proliferation of nuclear weapons.
(ii) Its generation is very expensive.
Answer: Methane and hydrogen are two combustible components of biogas.
Answer: Hot sports are placed within the mantle where rocks melt tl generate magma.
Answer:
i) Easily accessible and easy to store.
ii) Economical and eco-friendly.
Answer: Nitrogen and phosphorus.
Two Marks Questions
Answer: A reaction in which two nuclei of lighter elements combine to form a heavy nucleus with the liberation of a tremendous amount of energy is a nuclear fusion reaction.
Two advantages are:
i) a Large amount of energy is produced from a very small amount of fuel.
ii) Produces nonpolluting waste / does not produce gases which pollute the environment/cause greenhouse effect.
Answer:
i) Hydrogen
ii) Hydrogen sulphide
iii) Methane
iv) Carbon dioxide
Answer:
i) Slurry is used as manure.
ii) Slurry is rich in nitrogen and phosphorus.
Answer:
i)Very small Uranium yields tremendous energy.
ii) The released energy can be used to produce steam and further generated electricity.
Answer:
Methane is the major constituent of biogas.
Three characteristics to prove it as an excellent fuel are
i) Smoke
ii) Leave no residue
iii) Higher heat of combustion.
Answer:
Charcoal is better fuel than food because:
i) It is smokeless and leaves no residue.
ii) It has a higher heat of combustion.
Answer:
i) Burning of coal or petroleum products lead to air pollution.
ii) The oxides of C, N and S are released on burning fossil fuels as acidic oxides lead to acid rain and affect water and soil.
Answer:
Fossil fuels like coal, petroleum, natural gas, etc. if exhausted cannot be generated rapidly as they take millions of years to form again.
Two Marks Questions
Answer: A reaction in which two nuclei of lighter elements combine to form a heavy nucleus with the liberation of a tremendous amount of energy is a nuclear fusion reaction.
Two advantages are:
i) a Large amount of energy is produced from a very small amount of fuel.
ii) Produces nonpolluting waste / does not produce gases which pollute the environment/cause greenhouse effect.
Answer:
i) Hydrogen
ii) Hydrogen sulphide
iii) Methane
iv) Carbon dioxide
Answer:
i) Slurry is used as manure.
ii) Slurry is rich in nitrogen and phosphorus.
Answer:
i)Very small Uranium yields tremendous energy.
ii) The released energy can be used to produce steam and further generated electricity.
Answer:
Methane is the major constituent of biogas.
Three characteristics to prove it as an excellent fuel are
i) Smoke
ii) Leave no residue
iii) Higher heat of combustion.
Answer:
Charcoal is better fuel than food because:
i) It is smokeless and leaves no residue.
ii) It has a higher heat of combustion.
Answer:
i) Burning of coal or petroleum products lead to air pollution.
ii) The oxides of C, N and S are released on burning fossil fuels as acidic oxides it leads to acid rain and affects water and soil.
Answer:
Fossil fuels like coal, petroleum, natural gas, etc. if exhausted cannot be generated rapidly as they take millions of years to form again.
Three Marks Questions
Answer: Energy used is dissipated in less usable form, The energy used is consumed and cannot be used again.
Example: Burning of candlelight + heat but products cannot produce chemical energy.
Answer:
(i) Released a large amount of energy on burning
ii) Easy to store
iii) Easy to transport
iv) Does not produce smoke
v) Environment friendly
Answer:
i) as cow dung cakes
ii) as biogas
Biogas is better than cow dung cakes because it has a high heating capacity and is non – polluting as it burns without smokes and leaves no residue like ash, slurry left in the biogas plant is a good manure for fields.
Answer:
i) Does a large amount of work per unit volume or mass.
ii) Easy to store and transport.
iii) It should be economical and easily accessible.
Answer:
An ideal source of energy has the following qualities:
i) Production of a large amount of heat/energy
ii) Easily accessible and easy to store within less space
iii) less or no production of toxic by-products
Answer:
i) It produces a large amount of heat energy.
ii) It is smokeless and pollution-free.
iii) it is easy to store and transport.
Answer:
i) Criteria for selecting a good fuel:
a) Would do a large amount of work per unit volume or mass.
b) be easily accessible.
c) be easy to store and transport.
ii) Burning of fuels released gases like CO2, SO2, NO2 these causes air pollution with rain these pollutant falls as acid rain and causes soil pollution.
Answer:
i) Reason :
a) It is a traditional source of energy used in domestic and industrial areas.
b) Usually firewood is burnt in traditional chulhas.
ii) Bagasse is a residue of sugarcane after extracting juice from them.
Four Marks Questions
Answer: Hydrogen is not used as a common fuel because
i) When hydrogen is lighted it burns with an explosion.
ii) It is very difficult to store and transport hydrogen.
Hydrogen as a fuel.
Fuel cells are being developed that can store energy produced by burning hydrogen. Development of some materials that can absorb hydrogen and then release it at a steady rate.