31)

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

32)

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

33)

Which of the following is not possible ?

JEE Physics

A)

n = 2, l = 0, m = -1

B)

n = 3, l = 0, m = 0

C)

n = 3, l = 1, m = -1

D)

n = 2, l = 1, m = 0

34)

Which of the following sets of quantum numbers is correct for an electron in 4 f -orbital ?

JEE Physics

A)

n = 4, l = 3, m = + 1, s = + 1/2

B)

n = 4, l = 3, m = + 4, s = + 1/2

 

C)

n = 4, l = 4, m = - 4, s = - 1/2

D)

n = 3, l = 2, m = -2, s = + 1/2

35)

Non-directional orbital is

JEE Physics

A)

4p

B)

4d

C)

4f

D)

3s

36)

In a multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields ?
I . n = 1, l = 0, m = 0
II. n = 2, l = 0, m = 0
III. n = 2, l = 1, m = 1
IV n = 3, l = 2, m = 1
V. n = 3, l = 2, m = 0

JEE Physics

A)

IV & V

B)

III & IV

C)

II & III

D)

I & II

37)

Which one of the following oxidation states is not possible in metal carbonyls ?

 

JEE Physics

A)

+1

B)

-1

C)

0

D)

2

E)

-3

38)

The oxidation number of chromium in potassium dichromate is

JEE Physics

A)

+2

B)

+4

C)

+1

D)

+8

E)

+6

39)

The loss of electron is termed as

JEE Physics

A)

oxidation

B)

reduction

C)

combustion

 

D)

neutralization

40)

State the oxidation number of carbonyl carbon in methanal and methanoic acid, respectively

1) 0 and 0

2) 0 and + 2

3) + 1 and + 2

4) + 1 and + 3

JEE Physics

A)

0 & 0

B)

0 & +2

C)

+1 & +2

D)

+1  & +3