Nuclei Test

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Nuclei Test - 17

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Weekly Quiz Competition

Question 1
1 / -0

The high temperature required to initiate the nuclear fusion reaction is to overcome the _______ present between the atoms.

A
nuclear force

B
electrostatic force

C
gravitational force

D
magnetic force

Solution

B. Electrostatic force
Ionic bonding is the electrostatic force of attraction between positively and negatively charged ions. The ions have been produced as a result of transfer of electrons between two atoms with a large difference in electronegativity. As the ionic bond is a strong bond high energy is required to break the bond. Hence high temperature is needed to indicate the nucleus fusion reaction.
Question 2
1 / -0

Find the value of $$x$$ in the following nuclear reaction.
$$_{7}{N}^{14} + _{2}{He}^{4} \rightarrow _{x}{O}^{17} + _{1}{H}^{1}$$

A
6

B
8

C
9

D
7

Solution

$$_{ 7 }{ N }^{ 14 }+_{ 2 }{ He }^{ 4 }\rightarrow _{ x }{ O }^{ 17 }+_{ 1 }{ H }^{ 1 }$$
From conservation of charge
$$7+2=x+1\\9=x+1\\x=8$$
Question 3
1 / -0

Nuclear fusion reactions cannot be harnessed for productive applications because :

A
These reactions require very high temperature and are controllable.

B
These reactions require very high temperature and are uncontrollable.

C
These reactions require very low temperature and are uncontrollable

D
These reactions require very low temperature and are controllable

Solution

These reactions require very high temperature and are uncontrollable
Fusion reaction is the combining of atom to form heavier nuclei. Fusion reaction requires high temperature. God fusion to occur on earth a, we need a temperature of at least 100 million degree Celsius. It is also an uncontrollable reaction.
Question 4
1 / -0

Find the binding energy per nucleon for lithium nucleus $$_{3}{Li}^{7}$$.
Take mass of $$_{3}{Li}^{7} = 7 u$$, mass of proton $$= 1.007825 u$$ and mass of neutron $$= 1.008665 u$$.
Take $$1 u = 931.5 MeV$$.

A
$$3.7 MeV$$

B
$$4.9 MeV$$

C
$$1.7 MeV$$

D
$$7.736 MeV$$

Solution

Binding energy per nucleon. $$E=\frac{\triangle E} {A}=\frac{\triangle m * 931}{A}$$

$$\triangle m= (3M_p+4M_n) -$$ Mass of $$_3Li^7$$

Where,

$$M_p $$ is the mass of the proton

$$M_n$$ is the mass of the neutron

$$\triangle m=$$ $$(3$$ X $$1.007825+4$$ X $$1.008898)-7=0.059067$$

$$\triangle E=0.059067$$ X $$931=54.991377$$

$$E=\frac{\triangle E}{A}=\frac{54.991377}{7}=7.736MeV$$
Question 5
1 / -0

Find $$x$$ in the following nuclear reaction.

$$_{2}{He}^{4} + _{13}{Al}^{27} \rightarrow _{x}{P}^{30} + _{0}{n}^{1}$$

A
14

B
13

C
15

D
11

Solution

C
$$_{2}He^{4}+_{13}Al^{27}\rightarrow _{15}P^{30}+_{o}n^{1}$$
Question 6
1 / -0

One a.m.u is defined as mass of :

A
$$\frac{1}{16}^{th}$$ mass of one oxygen atom

B
$$\frac{1}{14}^{th}$$ mass of one atom of nitrogen

C
$$\frac{1}{12}^{th}$$ mass of one carbon-12 atom

D
None of above

Solution

One a.m.u. is defined as mass of $$\frac1{12}^{th}$$ the mass of one carbon-12 atom.
Question 7
1 / -0

Mass of atom expressed in atomic mass unit is :

A
Atomic mass

B
Molecular mass

C
Atomic number

D
None of the above

Solution

The mass of an atom expressed in amu is known as atomic mass. atomic mass unit defined as a unit of mass used to express atomic and molecular weights, equal to one-twelfth of the mass of an atom of carbon-12.
Question 8
1 / -0

Find $$x$$ in the following nuclear reaction.

$$_{12}{Mg}^{24} + _{2}{He}^{4} \rightarrow _{14}{Si}^{x} + _{0}{n}^{1}$$

A
17

B
27

C
37

D
24

Solution

From conservation of mass
$$24+4=x+1 \\x=28-1=27$$
Question 9
1 / -0

Complete the reaction:
$$_{86}{Rn}^{220} \rightarrow _{84}{Po}^{216} + $$ __________

A
$$\beta$$

B
$$\gamma$$

C
$$\alpha$$

D
$${H}_{1}^{1}$$

Solution

$${ _{ 86 }{ Rn }^{ 220 }\rightarrow { _{ 84 }{ Po }^{ 216 }+{ _{ Z }{ X }^{ A } } } }\\ \because Z+84=86\quad and\quad 220=216+A\\ So,Z=2\quad and\quad A=4\\ { _{ 2 }{ \alpha }^{ 4 } }$$
So, it is $$\alpha$$ particle.
So, (C) is correct option.
Question 10
1 / -0

Back isotopes of hydrogen has ________ proton. Fill in the blank.

A
0 (zero)

B
1 (one)

C
2 (two)

D
3 (three)

Solution

Each isotopes in the nucleus of hydrogen has one proton (Z = 1). but protium has no neutron, deutrium has 1 neutron and tritium has 2 neutrons.

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Nuclei Test - 17

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Nuclei Test - 17

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SHARING IS CARING

Question 1

nuclear force

electrostatic force

gravitational force

magnetic force

Solution

Question 2

6

8

9

7

Solution

Question 3

These reactions require very high temperature and are controllable.

These reactions require very high temperature and are uncontrollable.

These reactions require very low temperature and are uncontrollable

These reactions require very low temperature and are controllable

Solution

Question 4

$$3.7 MeV$$

$$4.9 MeV$$

$$1.7 MeV$$

$$7.736 MeV$$

Solution

Question 5

14

13

15

11

Solution

Question 6

$$\frac{1}{16}^{th}$$ mass of one oxygen atom

$$\frac{1}{14}^{th}$$ mass of one atom of nitrogen

$$\frac{1}{12}^{th}$$ mass of one carbon-12 atom

None of above

Solution

Question 7

Atomic mass

Molecular mass

Atomic number

None of the above

Solution

Question 8

17

27

37

24

Solution

Question 9

$$\beta$$

$$\gamma$$

$$\alpha$$

$${H}_{1}^{1}$$

Solution

Question 10

0 (zero)

1 (one)

2 (two)

3 (three)

Solution

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