Nuclear Chemistry Test

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Nuclear Chemistry Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

In isomeric transition, which of the following statement is correct.

A
There is small change in mass of nuclei.

B
There is small change in charge of nuclei

C
There is no change in charge and mass of nuclei

D
These is a change both in charge and mass of nuclei

Solution

In isomeric transition there is no change in charge and mass of the nuclei.
Question 2
1 / -0

About radioactive equilibrium, Which of the following is incorrect

A
At equilibrium, the various constituents of the system will be present in the ratio of their half-lives

B
The shorter the half life period, the more easily is equilibrium state attained

C
Radioactive equilibrium like chemical equilibrium is reversible

D
At radioactive equilibrium all the ratio elements disintegrate at the same rate

Solution

Radioactive equilibrium, unlike chemical equilibrium, is not reversible.

All other statements are correct.
Question 3
1 / -0

A moderator in the nuclear reactor

A
Slows down the neutrons from the fission process

B
Regulates the excess neutrons produced in the fission.

C
Causes the kinetic energy of high speed neutrons of the fission to decrease

D
Absorbs secondary electrons of the fission to maintain the neutron multiplication factory to unity

Solution

Moderator used in nuclear reactor for slows down the neutrons from the fission process and causes the kinetic energy of high speed neutrons of the fission to decrease.
Question 4
1 / -0

Which of the following triad(s) consist of all the nuclides to be isotonic?

A
B-12,C-13,N-14

B
K-39,Ca-40,Sc-45

C
Ge⁷⁶,As⁷⁷,Ga⁷⁵

D
Ar-40,K-40,Ca-40

Solution

The following nuclides Ge⁷⁶, As⁷⁷, Ga⁷⁵ are isotonic.
Question 5
1 / -0

Rate of disintegration is not affect by.

A
Pressure

B
magnetic field

C
electric field

D
temperature

Solution

Radioactive disintegration rate is affected by temperature.
Question 6
1 / -0

Which of the following statement (s) is/are not correct ?

A
The excessive use of radio therapy may be harmful and may cause cancer

B
For treatment of leukemia P-33 is commonly used

C
For treatment of thyroid cancer we use 1-131

D
For treatment of cancer Co-59 is used

Solution

For treatment of leukemia P-32 is used.
Question 7
1 / -0

Which nuclide is the most stable? Use magic numbers method.

A
O¹⁶

B
Ni⁵⁹

C
V⁵¹

D
C¹²

Solution

O¹⁶ is doubly magic.p=8,n=8
Question 8
1 / -0

Statement : 1 For maximum stability n/p ratio must be equal to 1.

Statement : 2 Loss of α-and β-particles has no role in n/p ratio.

A
Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanations of Statement-1.

B
Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1.

C
Statement-1 is true but Statement-2 is false.

D
Statement-1 is false but Statement-2 is true.

Solution

Loss of α or β-particle is to change N/P ratio so that it lies within the stability belt. Loss of α-particle increases N/P ratio while loss of β-particle decreases N/P ratio.
Question 9
1 / -0

13AI²⁹ is expected to disintegrate by. Note: .₁₃AI²⁷ is a stable isotope.

A
β-emission

B
positron emission

C
proton emission

D
α-emission

Solution

n/p ratio is too large, which decreases by â-emission.

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Nuclear Chemistry Test - 3

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Nuclear Chemistry Test - 3

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Question 1

There is small change in mass of nuclei.

There is small change in charge of nuclei

There is no change in charge and mass of nuclei

These is a change both in charge and mass of nuclei

Solution

Question 2

At equilibrium, the various constituents of the system will be present in the ratio of their half-lives

The shorter the half life period, the more easily is equilibrium state attained

Radioactive equilibrium like chemical equilibrium is reversible

At radioactive equilibrium all the ratio elements disintegrate at the same rate

Solution

Question 3

Slows down the neutrons from the fission process

Regulates the excess neutrons produced in the fission.

Causes the kinetic energy of high speed neutrons of the fission to decrease

Absorbs secondary electrons of the fission to maintain the neutron multiplication factory to unity

Solution

Question 4

B-12,C-13,N-14

K-39,Ca-40,Sc-45

Ge76,As77,Ga75

Ar-40,K-40,Ca-40

Solution

Question 5

Pressure

magnetic field

electric field

temperature

Solution

Question 6

The excessive use of radio therapy may be harmful and may cause cancer

For treatment of leukemia P-33 is commonly used

For treatment of thyroid cancer we use 1-131

For treatment of cancer Co-59 is used

Solution

Question 7

O16

Ni59

V51

C12

Solution

Question 8

Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanations of Statement-1.

Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1.

Statement-1 is true but Statement-2 is false.

Statement-1 is false but Statement-2 is true.

Solution

Question 9

β-emission

positron emission

proton emission

α-emission

Solution

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Ge⁷⁶,As⁷⁷,Ga⁷⁵

O¹⁶

Ni⁵⁹

V⁵¹

C¹²