Second Year Physics Chapter 20 Online MCQ Test for 2nd Year Physics Chapter 20 Atomic Spectra Preparation

FSC Part 2 Physics
Chapter 20 Test

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Physics FSC Part 2 Chapter 20 Online MCQ's Test

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Question # 1

The typical nuclei are less than:

Question # 2

Helium Neon Laser Beam emitted from discharge tube has a colour.

Question # 3

The first spectral lines were discovered in 1885, were

Question # 4

Hydrogen atom spectrum does not lie in

Question # 5

The velocity of electron moving is 1st orbit of hydrogen atom is:

Question # 6

Radius of first orbit of an atom is r1= 0.053 nm, Radius of second orbit r2 will be.

Question # 7

The process by which lesser beam can be used to generate 3-dimensional images of objects is called

Question # 8

Energy produced due to fission of uranium atom is:

Question # 9

The X-rays diffraction with crystal was first studied by

Question # 10

 Charge on an atom is:

Question # 11

Frequency of x-rays depends upon.

Question # 12

The radius of hydrogen atom is:

Question # 13

The value of Rydberg constant is

Question # 14

A° is the unit of:

Question # 15

Kx -Xrays are produced due to transition of electron from.

Question # 16

_____ has the largest de Broglie wavelength at same speed.

Question # 17

The line radiations emitted from by hydrogen filled discharge tube can be analyzed into.

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FSC Part 2 Physics Chapter 20 Online Test MCQ's

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 The 1st Bohr atom in the hydrogen atom has radius
A. 3.56 x 10-10 m
B. 0.053 x 10-11 m
C. 0.53 x 10-11 m
D. 5.30 x 10-11 m
2 Radius of first orbit of an atom is r1= 0.053 nm, Radius of second orbit r2 will be.
A. 0.106 nm
B. 0.212 nm
C. 0.053 nm
D. 0.53 x 10-10 nm
3 The rest mass x ray photon is
A. Infinite
B. Zero
C. 1.67 X-17 kg
D. All of the above
4 If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:
A. 10.2 eV
B. 0 eV
C. 3.4 eV
D. 6.8 eV
5 Paschen series lies in the
A. Far ultraviolet region
B. Visible region
C. Ultraviolet region
D. Inferred region
6 An electron in H -atom is excited from ground state n=4 , How many spectral lines are possible in this case.
A. 6
B. 5
C. 4
D. 3
7 The X-rays diffraction with crystal was first studied by
A. W.H Bragg
B. W.L. Bragg
C. Michelson
D. None of these
8 Kx -Xrays are produced due to transition of electron from.
A. K to L shell
B. L to K shell
C. M to K shell
D. M to L shell
9 The following gas was identified in the sun using spectroscopy
A. Hydrogen
B. Helium
C. Carbon
D. Nitrogen
10 The radius of 10th orbit in hydrogen atom is.
A. 0.053 nm
B. 0.53 nm
C. 5.3 nm
D. 53 nm

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