Nuclei Test

Result

Nuclei Test - 27

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

The atomic mass of $$_{8}O^{16}$$ is $$15.9949 amu$$. Mass of one neutron and one proton is $$2.016490 amu$$ and the mass of an electron is $$0.00055 amu$$. The binding energy per nucleon of oxygen atom is

A
$$7.97 MeV$$

B
$$11.5 MeV$$

C
$$22.8 MeV$$

D
$$82.3 MeV$$

Solution

The number of proton $$p=8$$ and number of neutron, $$n=16-8=8 $$
Total number of nucleon $$N=16$$
Combined mass of nuclei $$= $$ total mass of proton + total mass of neutron $$=8\times 2.016490=16.13192 $$ amu
Mass defect $$\Delta m =16.13192-15.9949=0.13702 $$ amu
Binding energy per nucleon $$=\Delta m c^2/N=(0.137\times 931.49)/16= 127.6141/16=7.975MeV$$ where $$ 1 amu =931.49/c^2 MeV$$
Question 2
1 / -0

The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u $$=$$ atomic mass unit). The binding energy of $$ ^{4}_{2}He$$ is (Given : helium nucleus mass $$\approx $$ 4.0015 u)

A
0.0305 J

B
0.0305 erg

C
28.4 MeV

D
0.061 u

Solution

$$BE=\Delta m\times 931$$
$$=[2(1.0087+1.0073)-4.0015]\times 931$$
$$=28.4 MeV$$
Question 3
1 / -0

If the masses of deuterium and that of helium are 2.0140 amu and 4.0026 amu, respectively and that 22.4 MeV energy is liberated in the reaction $$_6^3Li + _1^2H \to _2^4H + _2^4He$$, has the mass of $$_3^6Li$$ is

A
6.015 amu

B
6.068 amu

C
5.980 amu

D
6.00 amu

Solution

$$Li_3+2_1H\rightarrow 4_2H+4_2He$$
$$\Delta m=-(2\times 4\cdot 0026-2\cdot 0140-m)$$
$$m-5\cdot 9912$$
$$22\cdot 4=m-5\cdot 9912\times 931\cdot 5$$
$$0\cdot 024=m-5\cdot 9912$$
$$\Rightarrow m=6\cdot 0152 amu$$
Question 4
1 / -0

The mass of a $$^7_3Li $$ nucleus is 0.042 u less than the sum of the masses of all its nucleons. The binding energy per nucleon of $$^7_3Li $$ nucleus is nearly

A
46 MeV

B
5.4 MeV

C
3.9 MeV

D
23 MeV

Solution

$$\begin{aligned}\Delta m &=0.042 \\&=0.042+2\times 1.66 \times 10^{-27}\mathrm{~kg} \\\text { Binding energy }&=\Delta \mathrm{m} c^{2} \\\text { Binding energy per nucleon } \\=& \frac{\Delta m c^{2}}{7} \\&[\operatorname{mass number} \text { of } l i=7]\end{aligned}$$
$$\begin{array}{l}=\frac{0.042 \times 1.66\times 10^{-27} \times\left(3 \times 10^{8}\right)^{2}}{7} \mathrm{~J} \\\text { To convert the energy in ev from } \\\text { joule, we will divide it by } 1.6 \times 10^{-19} \\=\frac{0.042 \times 1.66 \times 10^{-27} \times\left(3 \times 10^{8}\right)^{2}}{7 \times 1.6 \times 10^{-19}}\mathrm{ev} \\=5.4 \times 10^{6}\mathrm{ev} \\\therefore \text { Energy }\operatorname{lost} =5.4\mathrm{Mev}\end{array}$$
Question 5
1 / -0

The binding energy per nucleon in deutorium and helium nuclei are 1.1 MeV and 7.0 MeV, respectively. When two deuterium nuclei fuse to form a
helium nucleus the energy released in the fusion is -

A
2.2 MeV

B
28.0 MeV

C
30.2 MeV

D
23.6 MeV

Solution
Question 6
1 / -0

To obtain an isotope of a given radioactive atom, the atom must emit

A
one alpha and one beta particle

B
one alpha and two beta particle

C
two alpha and two beta particle

D
three alpha and four beta particle

Solution

Emission of-particle decreases the atomic number of the product by two and each $$\beta$$ - emission increases the atomic number by one. So the atomic number remains the same and the mass number is different. after emitting one alpha and 2 beta.
Question 7
1 / -0

Atoms of same element having same atomic number but different mass number is

A
Isobars

B
Isotone

C
Isotope

D
None of these

Solution

$$\begin{array}{l}\text { Atoms having same atomic number but different mass } \\\text { number is called Isotope. } \\\therefore \text { Isotope is correct }\end{array}$$
Question 8
1 / -0

Which of the following is true for the following isotopes of uranium

U$$^{235}$$ and U$$^{238}$$?

A
both contain the same number of neutrons

B
both contain the same number of protons, electrons and neutrons

C
both contain the same number of protons and electrons but U$$^{238}$$ contains three more neutrons than U$$^{235}$$

D
U$$^{238}$$ contain three less neutrons than U$$^{235}$$

Solution

Natural Uranium contains $$3$$ radioactive isotopes $${ U }^{ 234 },{ U }^{ 235 }$$ and $${ U }^{ 238 }$$
$${ U }^{ 238 }$$ has a mass number
(proton $$92+$$neutron $$146$$) $$=238$$
$${ U }^{ 235 }$$ has mass number (proton $$92+$$ neutron$$143$$) $$=235$$
Hence we can say that both contain the same number of protons and electrons but $${ U }^{ 238 }$$ contains three more neutrons than $${ U }^{ 235 }$$
Question 9
1 / -0

In the process of nuclear fusion

A
only heavy nucleus break into light nuclei

B
fusion of light nuclei at normal temperature takes place

C
fusion of light nuclei at high pressure and low temperature takes place

D
fusion of light nuclei at high pressure and high temperature takes place

Solution

Nuclear fusion is a reaction in which two or more atomic nuclei come close enough to form one or more different atomic nuclei and subatomic particles (neutrons or protons)
Inside the sun fusion reaction take place at very high temperature and enormous gravitational pressure.
Question 10
1 / -0

For a nuclear fusion process, suitable nuclei are

A
Any Nuclei

B
Heavy Nuclei

C
Light Nuclei

D
Nuclei lying in the middle of Periodic table

Solution

The process in which two or more light, nuclei are combined into a single nucleus with the release of tremendous amount of energy is called as nuclear fusion
Hence light nuclei are suitable for the nuclear fusion process

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Nuclei Test - 27

Result

Nuclei Test - 27

Score

-

Rank

-

SHARING IS CARING

Question 1

$$7.97 MeV$$

$$11.5 MeV$$

$$22.8 MeV$$

$$82.3 MeV$$

Solution

Question 2

0.0305 J

0.0305 erg

28.4 MeV

0.061 u

Solution

Question 3

6.015 amu

6.068 amu

5.980 amu

6.00 amu

Solution

Question 4

46 MeV

5.4 MeV

3.9 MeV

23 MeV

Solution

Question 5

2.2 MeV

28.0 MeV

30.2 MeV

23.6 MeV

Solution

Question 6

one alpha and one beta particle

one alpha and two beta particle

two alpha and two beta particle

three alpha and four beta particle

Solution

Question 7

Isobars

Isotone

Isotope

None of these

Solution

Question 8

both contain the same number of neutrons

both contain the same number of protons, electrons and neutrons

both contain the same number of protons and electrons but U$$^{238}$$ contains three more neutrons than U$$^{235}$$

U$$^{238}$$ contain three less neutrons than U$$^{235}$$

Solution

Question 9

only heavy nucleus break into light nuclei

fusion of light nuclei at normal temperature takes place

fusion of light nuclei at high pressure and low temperature takes place

fusion of light nuclei at high pressure and high temperature takes place

Solution

Question 10

Any Nuclei

Heavy Nuclei

Light Nuclei

Nuclei lying in the middle of Periodic table

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.