Chemistry Chapter 5 Atomic Structure Mcqs Test Online 11th Class Punjab

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Question 1 of 10

Chemistry

1. Wave mechanical model of the atom depends upon

Schrodinger’s wave equation

De-Broglie’s concept of duality.

Uncertainty Principle

All of the above

Question 1 of 10

Question 2 of 10

2. The energy of an electromagnetic radiation is 3 x 10⁻¹² ergs. What is its wave-length in nano meters?

400

228.3

3000

662.5

Question 2 of 10

Question 3 of 10

3. For which species Bohr’s theory does not apply

H

Li²⁺

Be

He⁺

Question 3 of 10

Question 4 of 10

4. The third line in Blamer series corresponds to an electronic transfer between which Bohr’s orbit in hydrogen.

5 → 3

4 → 2

4 → 3

5 → 2

Question 4 of 10

Question 5 of 10

5. Which one of the following statement is not correct?

The angular movement of the electron in the ground state of hydrogen atom is equal to h/2

Lyman series of hydrogen spectrum occurs in the ultraviolet region

Rydberg’s constant and wave number have same unit

The radius of first Bohr orbit of hydrogen atom is 2.116 x 10⁻⁸ cm

Question 5 of 10

Question 6 of 10

6. When an electron of charge ‘e’ and mass ‘m’ moves with velocity ‘v’ about the nuclear change Ze in the circular orbit of radius ‘r’, the P.E of electron is given by

Ze²/r

mv²/r

Ze²/r²

-Ze²/r

Question 6 of 10

Question 7 of 10

7. Which one of the following is not isoelectronic pair

Mg²⁺, Be²⁺

N³⁻, O²⁻

F, Al³⁺

N²⁻,O²⁻

Question 7 of 10

Question 8 of 10

8. Which of following quantum numbers is not obtained from Schrodinger wave equalier?

Principal quantum number, n

Magnetic quantum number, m

Azimuthal quantum number, l

Spin quantum number, s

Question 8 of 10

Question 9 of 10

9. Electronic configuration of species M²⁺ is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ and its atomic weight is 56 number of neutrons in the nuclear of species M is

20

30

28

26

Question 9 of 10

Question 10 of 10

10. From the discharge tube experiment, it is concluded that

Positive rays are heavier than protons

Mass of a proton is in fraction

Nucleus contains positive change

Matter contained electrons

Question 10 of 10

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