Nuclear Fission

Q.

The first critical nuclear fission reaction was carried out in

1. $1942$

2. $1945$

3. $1950$

4. $1964$

Q. State true or false.
Nuclear reactions are exothermic in nature and produces large amount of energy.

1. True
2. False

Q. Which energy is produced by nuclear fission or nuclear fusion?

1. Thermal Energy
2. Geothermal energy
3. Nuclear energy
4. Tidal Energy

Q. The energy released due to loss in mass during the process of nuclear fission and fusion is called:

1. electrical energy
2. nuclear energy
3. hydro energy
4. geothermal energy

Q.

The process of splitting of heavy nuclei into small nuclei is

1. Mass defect

2. Nuclear splitting

3. Nuclear fission

4. Nuclear fusion

Q. There are two atoms A and B. The atomic number of A is $116$ and the atomic number of B is $29$. Which of them is more capable of undergoing nuclear fission reaction?

1. Only B
2. Both A and B
3. Only A
4. Neither A nor B

Q. Define process of nuclear fission. Writ the steps involved in generating electricity in a nuclear reactor.

Q. Which of the following correctly matches the hydrogen bomb and an atom bomb with the principle used in them?

1. Hydrogen bomb - Fission reaction; Atom bomb - Fusion reaction
2. Hydrogen bomb - Fission reaction; Atom bomb- Fission reaction
3. Hydrogen bomb - Fusion reaction; Atom bomb - Fusion reaction
4. Hydrogen bomb - Fusion reaction; Atom bomb - Fission reaction

Q. Energy produced in nuclear power plants is example of:

1. controlled nuclear fission.
2. controlled nuclear fusion.
3. uncontrolled nuclear fusion.
4. uncontrolled nuclear fission.

Q. Energy released in the fission of 1 kg of U-235 is equivalent to energy obtained from burning of coal weighing ___.

1. 2500 ton
2. 25000 ton
3. 25 ton
4. 250 ton

Q. A nuclear reaction, whether fission or fusion, releases a ____ amount of energy.

1. enormous
2. moderate
3. zero
4. little

Q. The process in which a heavy nucleus splits into two lighter nuclei, when hit by neutrons is:

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

Q. In a nuclear fission process, what happens to the nucleus of an atom?

1. A heavier nucleus is broken into lighter nuclei.
2. Lighter nuclei fuse together to form heavier nucleus.
3. Nucleus ejects protons.
4. Nucleus shed its electrons.

Q. The heat energy produced in the nuclear fission reactions can be used to produce

1. Solar energy
2. Nuclear energy
3. Electricity
4. None of these

Q. When the nucleus of an atom is smashed it releases energy. This energy is commonly called :

1. heat energy
2. light energy
3. chemical energy
4. nuclear energy

Q. Statement 1: Nuclear bombs can destroy big cities.
Statement 2: Nuclear power plants can produce energy to power big cities.

1. Only statement​ 1 is correct.
2. Both statements are correct.
3. Only statement​ 2 is correct.
4. Both statement s are wrong.

Q.

The scientist who first carried out critical nuclear fission reaction is _____.

1. Otto Hahn

2. Enrico Fermi

3. Hans Bethe

4. Einstein

Q. Why do only big nuclei undergo nuclear fission reaction?

1. Bigger nuclei are unstable because of presence of large number of like charge particles.
2. Bigger nuclei have less number of neutron which makes them unstable.
3. Bigger nuclei have very less number of protons which makes them unstable.
4. In case of bigger nuclei, electron reside inside the nucleus.

Q. How is nuclear energy released in a fission process? How is this energy converted into electric energy?