Q1 Explain the process of nuclear fission due to bombardment by neutrons on uranium nuclei. Solution

Q2 What is meant by nuclear fission? The fission process itself is not a chain reaction, why? Explain what step is taken to obtain chain reaction. Solution

Q3 What is nuclear chain reaction? Explain, by example, what is the role of critical mass in it. Solution

Q4 Explain 'critical mass' and 'controlled chain reaction" in reference to a nuclear reactor. Solution

Q5 Draw a labelled diagram of a nuclear reactor, stating the function of each part. Solution

Q6 In a nuclear reactor, what is the function of:

(i) The moderator
(ii) The control rods
(iii) The coolant? Solution

Q7 What are the nuclear fusion and fission processes? Explain qualitatively on the basis of binding energy, why energy is released in a fission process? Solution

Q8 What is nuclear fusion? How does it differ from nuclear fission? Give an example of nuclear fusion in nature. Solution

Q9 How is energy being produced continuously in sun? Give reactions. Why do these reactions not occur at normal temperatures? Solution

Q10 What is nuclear fusion? Describe how the sun is emitting huge amount of energy (in the form of heat and light) continuously for billions of years (no reaction equations are required)? Solution

Q11 Explain energy generation in stars. Solution