In the nuclear reactor of a power plant:

1. How do control rods control the rate of fission?
2. How is heat removed from the reactor core, and what use is made of this heat?

What are the various factors which we should keep in mind while choosing a source of energy?

What is nuclear fusion? Explain with an example. Write the equation of the reaction involved.

What are the characteristics of an ideal fuel (or good fuel)?

Describe the working of a hydrogen bomb.

Why is biogas considered an ideal fuel for domestic use?

What is the nuclear fuel in the sun? Describe the process by which energy is released in the sun. Write the equation of the nuclear reaction involved.

How is charcoal prepared? Explain why, charcoal is a better fuel than wood.

The calorific values of three fuels A, B and C are 33kJ/ g, 48kJ/ g and 150kJ/ 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.

What are the advantages and disadvantages of using a solar cooker?