How were fossil fuels formed? How these fossil fuels were made?
Name the places of our Country where fields of natural gas are found. Why is it called a clean fuel? Give two reasons.
Define the term 'fuel'. What are primary and secondary fuels? To which class of fuel do the following belong :
Coke, Wood, Petroleum, LPG.
48 kJ of energy is produced per minute in a nuclear reactor. Calculate the number of fissions which would be taking place in the reactor per second, if the energy released per fission is 3.2 × 10–11 J.
How many groups of nuclei are generated in the fission of 235U ? What are their characteristics ? Explain briefly the terms (i) prompt (ii) delayed, and (iii) spontaneous fission.
Write the four processes that can take place, after neutrons are emitted in a fission reaction. Which of these processes will cause the fission to continue? How is the energy of released neutrons lowered from 2 MeV to 0.025 MeV?