Fossil Fuels
Fossil Fuels
Fuels and Flames fuels:
Those carbon compounds which have energy stored in them and burn with heat and light are called fuels. The released energy (heat or light) is utilised for various purposes like for cooking food, running machines in factories etc. In fuels, the carbon can be in free state as present in coal, coke and charcoal or in combined state as present in petrol, LPG (Liquefied petroleum gas whose main constituent is butane), CNG (Compressed natural gas, main constituent of which is methane), kerosene, petroleum, natural gas etc. Those fuels which were formed by the decomposition of the remains of the pre-historic plants and animals (fossils) buried under the earth long ago are called fossil fuels. E.g. coal, petroleum and natural gas.
Coal: It is a complex mixture of compounds of carbon, hydrogen and oxygen and some free carbon along with traces of nitrogen and sulphur.
In fuels, the carbon can be in free state as present in _______________________. | |||
| Right Option : D | |||
| View Explanation | |||
The fuels which were formed by the decomposition of the remains of the pre-historic plants and animals (fossils) buried under the earth long ago are called _________________________. | |||
| Right Option : B | |||
| View Explanation | |||
_________________________ is a complex mixture of compounds of carbon, hydrogen and oxygen and some free carbon along with traces of nitrogen and sulphur. | |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [10]
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
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Barkha Arora
10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
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Prisha Gupta
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Eshan Arora
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Hiya Gupta
8thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
