Nuclear Fission

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

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

Q.

Is binding energy positive or negative?

Q. Can matter be converted into energy? Explain.

Q. A nuclear fission is initiated when a uranium nucleus is bombarded with a

1. proton
2. electron
3. neutron
4. positron

Q. Why only Boran or cadmium rods are used to control a nuclear reaction?

Q.

Which of the following statement is correct?

1. The rest mass of a stable nucleus is equal to the sum of the rest masses of its separated nucleons

2. The rest mass of a stable nucleus is greater than the sum of the rest masses of its separated nucleons

3. The rest mass energy of the parent nucleus must be more than the rest mass energy of the daughter nuclei.

4. In nuclear fission, energy is released by fragmentation of a very heavy nucleus

Q. Differentiate between nuclear fission and nuclear fusion reaction. ? [4 MARKS]

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

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

Q.

What happens if a nuclear bomb is thrown towards the sun and it detonates. What could be it's effect on the earth?

Q.

When ${}_{92}{U}^{235}$ undergoes fission. 0.1% of its original mass is changed into energy. $9\times {10}^{x}J$ of energy is released if $1kg$ of ${}_{92}{U}^{235}$ undergoes fission. Value of $x$ = ___

Q. Which of the following components of a nuclear reactor regulate the rate of chain reaction?

1. Fuel rods
2. Control rods
3. Coolant
4. Steam generator

Q.

Statement I: Nuclear fission is a spontaneous process i.e. there is no need for external energy supply for this to happen.
Statement II: In a nuclear fission reaction the rest mass energy of the parent nucleus is more than the combined rest mass energy of two daughter fragments and neutrons.

1. Both the statements are correct and statement II infers to statement I
2. Statement I is correct but statement II is incorrect
3. Both the statements are correct but statement II doesn’t infer to statement I
4. Statement II is correct but statement I is incorrect

Q. What do you understand by the chain reaction in nuclear fission? How is it controlled? [3 MARKS]

Q. Calculate the power of an electric pump that can lift $600\text{kg}$ of water from the ground into a tank placed at a height of $1200\text{cm}$ in $10$ seconds.

1. $2\text{kW}$
2. $6\text{kW}$
3. $7.2\text{kW}$
4. $9.6\text{kW}$

Q.

Fission of Uranium by slow neutrons is used in

1. Rocket propulsion

2. Particle accelerator

3. Electric generator

4. Nuclear reactor

Q.

What does the weak nuclear force in the atom do?

Q.

When ${}_{92}{U}^{235}$ undergoes fission, 0.1% of its original mass is changed into energy. $9\times {10}^{x}J$ of energy is released if $1kg$ of ${}_{92}{U}^{235}$ undergoes fission, then the value of $x$ = ___

Q.

A nucleus of mass $M+△m$ is at rest and it decays into two daughter nuclei of equal mass $\frac{M}{2}$ each. The speed of the light is $c$. Then what is the speed of the daughter nuclei?

1. $c\frac{△m}{M+△m}$

2. $c\sqrt{\frac{2△m}{M}}$

3. $c\sqrt{\frac{△m}{M}}$

4. $c\sqrt{\frac{△m}{M}}$

Q. A hypothetical nuclear fission takes place as following:
${}_{92}^{236}X{\to }_{56}^{140}Y{+}_{36}^{94}Y+neutrons$
How many neutrons will get emitted in the process?

1. 1
2. 2
3. 3
4. 4

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

1. True
2. False

Q.

Statement I: Nuclear fission is a spontaneous process i.e. there is no need for external energy supply for this to happen.
Statement II: In a nuclear fission reaction, the rest mass energy of the parent nucleus is more than the combined rest mass energy of two daughter fragments and neutrons.

1. Both the statements are correct and statement II infers to statement I
2. Both the statements are correct but statement II doesn’t infer to statement I
3. Statement I is correct but statement II is incorrect
4. Statement II is correct but statement I is incorrect

Q.

A nucleus of mass $M+△m$ is at rest and decays into two daughter nuclei of equal mass $\frac{M}{2}$ each. The speed of light is $c$. The speed of daughter nuclei is

1. $c\frac{△m}{M+△m}$

2. $c\sqrt{\frac{2△m}{M}}$

3. $c\sqrt{\frac{△m}{M}}$

4. $c\sqrt{\frac{△m}{M}}$

Q.

The steps for the nuclear fission are shown using the Liquid drop model. Which of these is the correct sequence?

1. b, c, a
2. b, a, c
3. c, b, a
4. a, b, c

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. Only statement​ 2 is correct.

3. Both statement s are wrong.

4. Both statements are correct.

Q.

What are the major hazards of a nuclear power plant?

1. Accidental leakage of radiation

2. All of These

3. Disposal and storage of nuclear waste

4. Uranium decomposes into harmful sub atomic masses

Q. Identify the equipment inside a nuclear reactor that limits the chain reaction.

1. 
2. 
3. 

Q. A hypothetical nuclear fission takes place as following:
${}_{92}^{236}X{\to }_{56}^{140}Y{+}_{36}^{94}Y+neutrons$
How many neutrons will get emitted in the process?

1. 1
2. 2
3. 3
4. 4

Q.

Which of the following will produce more energy in a short time?

1. Nuclear fission

2. Nuclear fusion

3. Both will produce the same amount of energy.

4. nothing can be decided

Q. Energy possessed by a body due to its motion is:

1. kinetic energy
2. nuclear energy
3. potential energy
4. thermal energy

Q.

Shown here are the steps of nuclear fission using the liquid drop model. Which of these is the correct sequence?

1. b, c, a
2. c, b, a
3. b, a, c
4. a, b, c