Atoms and Nuclei Test

Result

Atoms and Nuclei Test - 16

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

Hydrogen atom from excited state comes to the ground state by emitting a photon of wavelength λ . If R is the Rydberg constant, the principal quantum number n of the excited state is

A

B

C

D
Question 2
4 / -1

In the Bohr's model of the hydrogen atom, the lowest orbit corresponds to

A
infinite energy

B
maximum energy

C
minimum energy

D
zero energy
Question 3
4 / -1

In a hydrogen atom, the electron moves around the nucleus in a circular orbit of radius 5 ×10^-11 m. Its time period is 1.5 × 10^-16 s. The current associated with the electron motion (charge of electron is 1.6 × 10^-19 C)

A
1.00 A

B
1.066 × 10^-3 A

C
1.81 × 10^-3 A

D
1.66 × 10^-3 A

Solution
Question 4
4 / -1

If the radii of nuclei of ₁₃Al²⁷ and ₃₀Zn⁶⁴ and R₁ and R₂ respectively, then R₁/R₂ is equal to

A
27/64

B
64/27

C
4/3

D
3/4
Question 5
4 / -1

What is the difference of angular momenta of an electron in two consecutive orbits in hydrogen atom?

A
h/2

B
h/π

C
2π/h

D
h/2π
Question 6
4 / -1

A

B

C

D

Solution
Question 7
4 / -1

The ratio of minimum wave lengths of Lyman and Balmer series will be

A
1.25

B
0.25

C
5

D
10

Solution
Question 8
4 / -1

The ionisation potential of hydrogen atom is 13.6 eV. The energy required to remove an electron from the second orbit of hydrogen will be

A
27.4 eV

B
13.6 eV

C
3.4 eV

D
None of these
Question 9
4 / -1

The angular momentum (L) of an electron moving in a stable orbit around nucleus is

A
half integral multiple of h/2π

B
integral multiple of h

C
integral multiple of h/2π

D
half integral multiple of h
Question 10
4 / -1

If λ₁ and λ₂ are the wave lengths of the first members of the Lyman and Paschen series respectively, then λ₁ : λ₂ is

A
1 : 3

B
1 : 30

C
7 : 50

D
7 : 108