Atoms and Nuclei Test

Result

Atoms and Nuclei Test - 74

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Weekly Quiz Competition

Question 1
4 / -1

9 fmo is the mass of an isotope 8¹⁷ 0 , mp and mn are the masses of a Proton and neutron respectively, the binding energy of the isotebe is

A

B

C

D

Solution
Question 2
4 / -1

In gamma ray emission form a nucleus

A
there is no change in the proton-number and neutron number

B
Both the number are changes

C
only Proton number change

D
only neutron number change
Question 3
4 / -1

The half life time of a radioactive elements of x is the same as the mean life of another radioactive element Y. Initially they have same number of atoms, then

A
y will decay faster thean x

B
x will decay faster then y

C
x and y will decay at the same rate at all time

D
x and y will decay at the same rate initially.

Solution
Question 4
4 / -1

which of the following transition in hydrogen atoms emits Photon of highest frequency?

A
n = 2 to n = 6

B
n = 1 to n = 2

C
n = 2 to n = 1

D
n = 6 to n = 2

Solution
Question 5
4 / -1

An electron Passing through a Potential difference of 4.9 v collides with a mercury atom and transfer it to the first excited state what is transfer it to the first excited state. what is the wave length of Photon corresponding to the fraction of mercury atom to its normal state.

A
2050Å

B
2935Å

C
2525Å

D
2240Å

Solution
Question 6
4 / -1

The binding energy per nucleon for the Parent nucleus is E₁ and that for the daughter nuclei is E₂ then

A
E₁ < E₂

B
E₁ > E₂

C
E₁ = E₂

D
E₁ = 2E₂
Question 7
4 / -1

The speed of daughter nuclei is

A

B

C

D

Solution
Question 8
4 / -1

Light form the discharge tube containing hydrogen atom falls on the surface of a piece of sodium. The kinetic energy of the fastest photo electrons emitted form sodium is 0.73 eV. The work function for sodium is 1.82 eV. Ionisation Potential of hydrogen is 13.6 v and the mass of hydrogen atom is 1.67 × 10^–27 Kg
The energy of Photon causing the Photo electric emission is

A
4.08 × 10^–19 J

B
2.912 × 10^–19 J

C
1.744 × 10^–19 J

D
1.168 × 10^–19 J

Solution
Question 9
4 / -1

Light form the discharge tube containing hydrogen atom falls on the surface of a piece of sodium. The kinetic energy of the fastest photo electrons emitted form sodium is 0.73 eV. The work function for sodium is 1.82 eV. Ionisation Potential of hydrogen is 13.6 v and the mass of hydrogen atom is 1.67 × 10^–27 Kg
The quantum number of the two levels in the emission of the Photons are

A
n = 1 , n = 3

B
n = 2 , n = 4

C
n = 1 , n = 4

D
n = 3 , n = 4

Solution
Question 10
4 / -1

Light form the discharge tube containing hydrogen atom falls on the surface of a piece of sodium. The kinetic energy of the fastest photo electrons emitted form sodium is 0.73 eV. The work function for sodium is 1.82 eV. Ionisation Potential of hydrogen is 13.6 v and the mass of hydrogen atom is 1.67 × 10^–27 Kg
In this transition change in the angular momentum of electron is (where h is Plank constant )

A

B

C

D

Solution