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.
Which of the following are correct : (a) The carbon compounds which have energy stored in them and burn with heat and light are called fuels. (b) In fuels, the carbon can be in free state as present in coal, coke and charcoal. (c) Petroleum is dark viscous foul smelling oil and is also known as rock oil or black gold. | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following are correct : (a) Petroleum is dark viscous foul smelling oil and is also known as rock oil or black gold. (b) Petroleum is formed by the decomposition of the remains of extremely small plants and animals buried under the sea millions of years ago. | |||
| Right Option : C | |||
| View Explanation | |||
In fuels, the carbon can be in free state as present in _______________________. | |||
| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [10]
One of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thAbhyas 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
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thIt 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
10thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
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
7thAbout 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
8thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
