Introduction to Nuclear Fission

Q.

Calculate the number of neutrons emitted when ${}_{92}{U}^{235}$ undergoes controlled nuclear fission to ${}_{54}X{e}^{142}$ and ${}_{38}S{r}^{90}.$

(IIT-JEE, 2010)

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

Q. If uranium (mass number 238 and atomic number 92) emits an $\alpha -$ particle, the product has mass number and atomic number:

1. 236 and 92
2. 238 and 90
3. 236 and 90
4. 234 and 90

Q. If uranium (mass number 238 and atomic number 92) emits an $\alpha -$ particle, the product has mass number and atomic number:

1. 236 and 92
2. 234 and 90
3. 238 and 90
4. 236 and 90

Q. The periodic table consists of 18 periods. An isotope of copper, on bombardment with protons, undergoes a nuclear reaction yielding element $X$ as shown below. To which group, element $X$ belongs in periodic table:
${}_{29}^{63}Cu{+}_1^{1}H\to 6_0^{1}n+\alpha +2_1^{1}H+X$

Q. Which of the following atomic mass of uranium is the most radioactive

1. 235
2. 248
3. 238
4. 226

Q.

Calculate the number of neutrons emitted when ${}_{92}{U}^{235}$ undergoes controlled nuclear fission to ${}_{54}X{e}^{142}$ and ${}_{38}S{r}^{90}.$

(IIT-JEE, 2010)

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

Q. Neutron is used as a

1. Reducing agent
2. Moderator
3. Tracer

4. In biological programme

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

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

Q. The periodic table consists of 18 periods. An isotope of copper, on bombardment with protons, undergoes a nuclear reaction yielding element $X$ as shown below. To which group, element $X$ belongs in periodic table:
${}_{29}^{63}Cu{+}_1^{1}H\to 6_0^{1}n+\alpha +2_1^{1}H+X$

1. $8$
2. $6$
3. $10$
4. $4$

Q.

What particle is produced when Phosphorus-29 decays to silicon-29?

1. positron

2. beta

3. gamma

4. alpha

Q. The periodic table consists of $18$ groups, An isotope of copper, on bombardment with protons, undergoes a nuclear reaction yielding element $X$ as shown below. To which group, element $X$ belongs in the periodic table ?

${}_{29}^{63}\text{Cu}{+}_1^{1}H\to 6_0^{1}n+\alpha +2_1^{1}H+X$

Q.

What particle is produced when Phosphorus-29 decays to silicon-29?

1. positron

2. gamma

3. beta

4. alpha

Q. The periodic table consists of 18 groups. An isotope of copper, on bombardment with protons, undergoes a nuclear reaction yielding element X as shown below. To which group, element X belongs in the periodic table?___
${}_{29}^{63}Cu{+}_1^{1}H\to 6_0^{1}n{+}_2^4\alpha +2_1^{1}H+X$

Q.

Assertion : Nuclear fission is always accompanied by release of energy.
Reason : Nuclear fission is a chain process.

1. If assertion is true but reason is false.
2. If the assertion and reason both are false.
3. If both assertion and reason are true but reason is not the correct explanation of the assertion.
4. If both assertion and reason are true and the reason is the correct explanation of the assertion.
5. If assertion is false but reason is true.

Q. The number of neutrons emitted when ${}_{92}^{235}U$ undergoes controlled nuclear fission to ${}_{54}^{142}Xe$ and ${}_{38}^{90}Sr$ is ___

Q. The number of neutrons emitted when ${}_{92}^{235}U$ undergoes controlled nuclear fission to ${}_{54}^{142}Xe$ and ${}_{38}^{90}Sr$ is: