Controlled and Uncontrolled Nuclear Reaction

Q.

Why is nuclear fission important?

Q.

Which of the following are the most effective projectiles for initiating nuclear reactions?

1. Electrons

2. Protons

3. Neutrons

4. none of these

Q.

Nuclear fission can be initiated by bombarding the nucleus with?

1. proton

2. slow neutron

3. $\alpha$-particle

4. fast neutron

Q.

The nuclear reaction that takes place in a nuclear reactor is

1. nuclear fusion reaction

2. controlled fission reaction

3. uncontrolled fission reaction

4. none of the above

Q.

The energy released by nuclear fission is used to

1. produce steam and generate electricity

2. produce another nuclear fission reaction

3. decompose uranium

4. none of these

Q.

Give reasons for the following:

Nuclear energy is the energy released during the nuclear reactions involving either the fission of heavy nuclei or those involving the fusion of light nuclei.

Q.

In case of nuclear fission, the energy liberated per fission is

1. negligible

2. small

3. large

4. very large

Q.

Which of the following is not a nuclear reaction?

1. Nuclear fission

2. Photosynthesis

3. Nuclear fusion

Q. The walls of a nuclear reactor should be made of

1. steel
2. carbon
3. gold
4. aluminium

Q. Describe the proce of nuclear fission Explain process involved in generating electricity in nuclear powerplant

Q. On an average how many neutrons are emitted in the fission reaction of U - 235?

1. 5
2. 3.4
3. 2.4
4. 10

Q. reaction is performed in nuclear power plants to produce electricity.

1. Nuclear fusion
2. Nuclear fission
3. Radioactive decay

Q.

The energy released from nuclear fission is used to -

1. produce steam.

2. produce another nuclear fission reaction.

3. generate electricity.

4. produce neutrons for the production of radioisotopes.

Q. A nuclear bomb is based on uncontrolled chain reaction.

1. False
2. True

Q.

which is more harmful nuclear fission and fusion .

Q. reaction is performed in nuclear power plants to produce electricity.

1. Nuclear fusion
2. Nuclear fission
3. Radioactive decay

Q.

Which of the following options are correct regarding controlling the rate of nuclear reaction?

1. A smaller size of fuel will have controlled rate of nuclear fission reaction.

2. Controlling the energy of neutrons affects the rate of nuclear fission reaction.

3. A larger size of fuel has less probability of a self-sustained chain reaction.

4. The constituents of the nuclear fuel determine the rate of the chain reaction.

Q. reaction is performed in nuclear power plants to produce electricity.

1. Nuclear fusion
2. Nuclear fission
3. Radioactive decay

Q.

The energy released from nuclear fission is used to -

1. produce steam.

2. produce another nuclear fission reaction.

3. generate electricity.

4. produce neutrons for the production of radioisotopes.

Q.

On an average how many neutrons are emitted in the fission reaction of U-235?

1. 13.4

2. 2.4

3. 40

4. 25

Q.

On an average how many neutrons are emitted in the fission reaction of U-235?

1. 25

2. 13.4

3. 2.4

4. 40

Q.

Which of the following options are correct regarding controlling the rate of nuclear reaction?

1. A smaller size of fuel will have controlled rate of nuclear fission reaction.

2. Controlling the energy of neutrons affects the rate of nuclear fission reaction.

3. A larger size of fuel has less probability of a self-sustained chain reaction.

4. The constituents of the nuclear fuel determine the rate of the chain reaction.

Q. A nuclear bomb is based on uncontrolled chain reaction.

1. False
2. True