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प्रश्न
Write a short note on the pollution caused by burning fossil fuels.
उत्तर
The burning of fossil fuels produces gases such as sulphur dioxide and nitrogen oxides that cause acid rain. Acid rain damages trees, land and buildings and affects aquatic life. The burning of fossil fuels produces carbon dioxide, which is responsible for the greenhouse effect on the earth. It also produces smoke and ashes, which pollute the air.
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संबंधित प्रश्न
The calorific values of three fuels A, B and C are 33 kJ/g, 48 kJ/g and 150 kJ/g, respectively. A is solid, B is liquid and C is a gas at room temperature. One combustion, both A and B produce carbon dioxide while C explodes forming steam. B and C leave no residue after combustion while A leaves behind some solid residue. Which one of the three fuels is the most ideal? Give two reasons to support your answer.
Which gaseous fuel is being used increasingly in transport vehicles like cars and buses these days?
What are the various steps which can be taken to control (or reduce) pollution caused by burning fossil fuels?
Which of the following is not produced by the burning of fossil fuels?
(a) nitrogen oxides
(b) sulphur oxides
(c) sodium oxides
(d) carbon oxides
Most of the sources of energy that we sue represent stored solar energy. Which of the following is not ultimately derived from the sun's energy?
(a) wind energy
(b) geothermal energy
(c) fossil fuels
(d) biomass
What type of nuclear reaction is responsible for the liberation of energy:
in a nuclear reactor?
Which produced of the nuclear fission of uranium-235 is utilised to cause further fission of its nuclei?
Fill in the blank
Coal, petroleum, and natural gas are _________fuels.
State whether the following is True or False.
Coal takes millions of years to form.
Fill in the blanks and complete the story.
About 300 million years ago, the earth had dense ______ in low lying wetland areas. Due to natural processes like ______ these forests got buried under the ______ As more ______ deposited over them, they were compressed. The ______ also rose as they sank deeper and deeper. Under high ______ and high ______ , dead plants got slowly converted into coal.
