Atoms and Nuclei Test

Result

Atoms and Nuclei Test - 46

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Weekly Quiz Competition

Question 1
4 / -1

The ratio of minimum wavelengths of Lyman and Balmer series will be

A
5

B
10

C
1.25

D
0.25

Solution
Question 2
4 / -1

In Bohr\'s model of hydrogen atom, which of the following pairs of quantities are quantized?

A
Energy and linear momentum

B
Linear and angular momentum

C
Energy and angular momentum

D
None of the above
Question 3
4 / -1

The energy of the highest energy photon of Balmer series of hydrogen spectrum is close to

A
13.6 eV

B
3.4 eV

C
1.5 eV

D
0.85 eV

Solution
Question 4
4 / -1

An electron changes its position from orbit n = 4 to the orbit n = 2 of an atom. The wavelength of the emitted radiation is (R = Rydberg\'s constant)

A

B

C

D

Solution
Question 5
4 / -1

If the energy of a hydrogen atom in nth orbit is E_n, then energy in the nth orbit of a singly ionized helium atom will be

A
4E_n

B
E_n/4

C
2E_n

D
E_n/2

Solution
Question 6
4 / -1

What is the ratio of wavelength of radiations emitted when an electron in hydrogen atom jumps from fourth orbit to second orbit and from third orbit to second orbit?

A
27 : 25

B
20 : 27

C
20 : 25

D
25 : 27

Solution
Question 7
4 / -1

A
910 Å,1213 Å

B
5463 Å, 7858 Å

C
1315 Å, 1530 Å

D
None of these

Solution
Question 8
4 / -1

What is the ground state energy of positronium?

A
13.6 eV

B
27.2 eV

C
5.4 eV

D
1.8 eV
Question 9
4 / -1

The transition of an electron from n₂ = 5, 6,... to n₁. = 4 gives rise to

A
Pfund series

B
Lyman series

C
Paschen series

D
Brackett series
Question 10
4 / -1

White light is passed through a dilute solution of potassium permanganate. The spectrum produced by the emergent light is

A
Band emission spectrum

B
Line emission spectrum

C
Band absorption spectrum

D
Line absorption spectrum