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objective Ques (158 results)
41)

The total number of atomic orbitals in fourth energy level of an atom is :

JEE Physics
A)

18

B)

17

C)

16

D)

32

E)

4

42)

The maximum number of sublevels, orbitals and electrons in N-shell of an atom are respectively

JEE Physics
A)

4, 12, 32

B)

4, 16, 30

 

 

C)

4, 16, 32

D)

4, 32, 64

43)

The stability of ferric ion is due to
 

JEE Physics
A)

completely filled d -orbitals

B)

completely filled f -orbitals

C)

half filled d -orbitals

D)

half filled f -orbitals

44)

A p-orbital in a given shell can accommodate upto

JEE Physics
A)

four electrons

 

 

 

B)

two electrons with opposite spin

C)

two electrons with parallel spin

D)

six electrons

45)

Zeeman effect refers to the

 

 

 

 

 

JEE Physics
A)

splitting up of the lines in an emission spectrum in the presence of an external electrostatic field

B)

emission of electrons from metals when light falls upon them

C)

splitting up of the lines in an emission spectrum in a magnetic field

D)

random scattering of light by colloidal particles

46)

The correct set of four quantum number for the valence electrons of rubidium atom (Z = 37) is

JEE Physics
A)

5, 1, 0, + 1/2

 

B)

5, 0, 0, + 1/2

C)

5, 1, 1, + 1/2

D)

5, 0, 1, + 1/2

47)

The magnetic quantum number for d-orbital is given by

JEE Physics
A)

2

 

 

 

B)

5

C)

0, 1, 2

D)

0, ± 1, ± 2

48)

Which one of the following sets of quantum numbers represents the highest energy level in an atom?

JEE Physics
A)

 n = 3, l = 1, m = 1, s = +1/ 2

B)

 n = 4, l = 0, m = 0, s = + 1/ 2

 

C)

 n = 3, l = 0, m = 0, s = +1/ 2

D)

 n = 3, l = 2, m = -2, s = + 1/ 2

49)

Which of the following is correct for number of electrons, number of orbitals and type of orbitals respectively in n-orbit ?

JEE Physics
A)

4, 4 and 8

 

 

 

B)

4, 16 and 32

C)

32, 16 and 4

D)

4, 8 and 16

50)

The number of electrons accommodated in an orbit with principal quantum number 2, is

JEE Physics
A)

2

B)

6

C)

10

D)

8

E)

4

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