Atomic Structure Test 1

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MCQ's with answers from chapter 5 Atomic Structure chemistry book 1 for FSC pre engineering and pre medical for Board of Intermediate and Secondary education. Also For Entry Test Preparation for UET, NUST, PIEAS, GIKI, AIR, FAST, WAH University, UHS, other engineering Universities and Medical Colleges.

1. The value of magnetic quantum number which gives us information about the number of orbitals is determined by:

A) 2l-1
B) 2(2l+1)
C) 2n+1
D) 2l+1

2. For hydrogen atom, if value of n=2, then value of atomic radius is :

A) 0.529 A
B) 2.11 A
C) 4.75 A
D) 8.4 A

3. Splitting of spectral lines when hydrogen atom is subjected to magnetic field is called

A) Zeeman effect
B) Photoelectric effect
C) Stark effect
D) compton effect

4. De-broglie equation is applicable for

A) macroscopic particle
B) microscopic particles
C) both A and B
D) none

5. Which of the following quantum numbers determines number of orbitals in a sub-shell.

A) azimuthal quantum number
B) magnetic quantum number
C) principal quantum number
D) spin quantum number

6. When electron jumps from n2= 2,3,4,... orbit to n2=1, the radiations emitted give spectral lenes in.

A) U.V region
B) I.R region
C) Visible region
D) none of the above

7. An orbital can accommodate two electrons with opposite spins according to:

A) Heisenberg's uncertainity principle
B) Auf-bau principle
C) Pauli exclusion principle
D) Hund's rule

8. Which is correct equation for Moseley's law.

A) Square root V = a(z-b)
B) E= mc^2
C) Lamda = h/mv
D) all

9. Which of the following order about frequency is correct.

A) Microwave>I.R>Visible > U.V
B) U.V> Visible> I.R> Microwave
C) Visible>U.V>Visible
D) I.R> Microwave>U.V>Visible

10. The total number of electrons in a subshell can be determined by.

A) 2n^2
B) 2l+1
C) 2(2l+1)
D) N^2