Atoms and Nuclei Test

Result

Atoms and Nuclei Test - 44

Score
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Rank
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Weekly Quiz Competition

Question 1
4 / -1

The ratio of minimum to maximum wavelength in Balmer series is

A
5 : 9

B
5 : 36

C
1 : 4

D
3 : 4

Solution
Question 2
4 / -1

According to classical theory, the circular path of an electron in Rutherford atom is

A
Spiral

B
Circular

C
Parabolic

D
straight line
Question 3
4 / -1

The wavelength of yellow line of sodium is 5896 Å. Its wave number will be

A
50883 × 10¹⁰ per second

B
16961 per cm

C
17581 per cm

D
50883 per cm

Solution
Question 4
4 / -1

Radius of the first orbit of the electron in a hydrogen atom is 0.53 Å. So, the radius of the third orbit will be

A
2.12 Å

B
4.77 Å

C
1.06 Å

D
1.59 Å

Solution
Question 5
4 / -1

In hydrogen atom which quantity is integral multiple of

A
Angular momentum

B
Angular velocity

C
Angular acceleration

D
Momentum
Question 6
4 / -1

In the following transitions, which one has higher frequency?

A
3 – 2

B
4 – 3

C
4 – 2

D
3 – 1

Solution
Question 7
4 / -1

The ratio of the wavelengths for 2 → 1 transition in Li⁺⁺, He⁺ and H is

A
1 : 2 : 3

B
1 : 4 : 9

C
4 : 9 : 36

D
3 : 2 : 1

Solution
Question 8
4 / -1

The ionisation potential of hydrogen atom is –13.6 eV. An electron in the ground state of a hydrogen atom absorbs a photon of energy 12.75 eV. How many different spectral lines can one expect when the electron make a downward transition?

A
1

B
4

C
2

D
6

Solution
Question 9
4 / -1

Whenever a hydrogen atom emits a photon in the Balmer series

A
It may not emit any more photons

B
It may emit another photon in the Paschen series

C
It must emit another photon in the Lyman series

D
It may emit another photon in the Balmer series
Question 10
4 / -1

In hydrogen atom, when electron jumps from second to first orbit, then energy emitted is

A
–13.6 eV

B
–27.2 eV

C
–6.8 eV

D
None of these

Solution