Atoms and Nuclei Test

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Atoms and Nuclei Test - 17

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Weekly Quiz Competition

Question 1
4 / -1

The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122 nm. The smallest wavelength in the infrared region of the hydrogen spectrum (to the nearest integer) is

A
802 nm

B
823 nm

C
1882 nm

D
1648 nm
Question 2
4 / -1

The diagram shows the energy levels for an electron in a certain atom, which transition shown represents the emission of a photon with the most energy?

A
III

B
IV

C
I

D
II
Question 3
4 / -1

The ionisation energy of Li²⁺ is equal to

A
9hcR

B
6hcR

C
2hcR

D
hcR
Question 4
4 / -1

In Raman effect, Stokes's lines are spectral lines having

A
frequency greater than that of the original line

B
wavelength equal to that of the original line

C
wavelength less than that of the original line

D
wavelength greater than that of the original line
Question 5
4 / -1

If a is radius of first Bohr orbit in hydrogen atom, the radius of the third orbit is

A
3a

B
9a

C
27a

D
81a
Question 6
4 / -1

If λ is the wavelength of hydrogen atom from the transition n = 3 to n = 1, then what is the wavelength for doubly ionised lithium ion for same transition?

A
λ/3

B
3λ

C
λ/9

D
9λ
Question 7
4 / -1

Wavelength of light emitted from second orbit to first orbit in a hydrogen atom is

A
6563 Å

B
4102 Å

C
4861 Å

D
1215 Å

Solution
Question 8
4 / -1

The shortest wavelength in Lyman series is 91.2 nm. The longest wavelength of the series is

A
121.6 nm

B
182.4 nm

C
243.4 nm

D
364.8 nm
Question 9
4 / -1

For ionising an excited hydrogen atom, the energy required (in eV) will be

A
a little less than 13.6

B
13.6

C
more than 13.6

D
3.4 or less
Question 10
4 / -1

A photon collides with a stationary hydrogen atom in ground state inelastically. Energy of the colliding photon is 10.2 eV. After a time interval of the order of micro second another photon collides with same hydrogen atom inelastically with an energy of 15 eV. What will be observed by the detector?

A
2 photon of energy 10.2 eV

B
2 photon of energy of 1.4 eV

C
One photon of energy 10.2 eV and an electron of energy 1.4 eV

D
One photon of energy 10.2 eV and another photon of energy 1.4 eV

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Re-Attempt Weekly Quiz Competition

Atoms and Nuclei Test - 17

Result

Atoms and Nuclei Test - 17

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SHARING IS CARING

Question 1

802 nm

823 nm

1882 nm

1648 nm

Question 2

III

IV

I

II

Question 3

9hcR

6hcR

2hcR

hcR

Question 4

frequency greater than that of the original line

wavelength equal to that of the original line

wavelength less than that of the original line

wavelength greater than that of the original line

Question 5

3a

9a

27a

81a

Question 6

λ/3

3λ

λ/9

9λ

Question 7

6563 Å

4102 Å

4861 Å

1215 Å

Solution

Question 8

121.6 nm

182.4 nm

243.4 nm

364.8 nm

Question 9

a little less than 13.6

13.6

more than 13.6

3.4 or less

Question 10

2 photon of energy 10.2 eV

2 photon of energy of 1.4 eV

One photon of energy 10.2 eV and an electron of energy 1.4 eV

One photon of energy 10.2 eV and another photon of energy 1.4 eV

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