XI Chemistry Unit - 2 Part - 4A

How many orbitals are possible in the 4^th energy level?

• 1

• 4

• 16

• 9

The wave functions corresponding to the Eigen values are called _________ orbitals.

• atomic

• molecular

• compound

• none of these

The maximum number of electrons in an orbital is given by the formula__________.

• 2(2l+1)

• l+1

• n+l+1

• none of these

For the principal quantum number n = 4, it is possible to have

• Only s orbital

• only s, p, d and f orbital

• only s and p orbital

• only s, p and d orbital

A set of orbitals for which the quantum number l = 2 is

• 3-fold degenerate

• 7-fold degenerate

• 5-fold degenerate

• none of these

What is the designation of the sub energy level if n=3 and l=2?

• 4f

• 3d

• 3s

• 3p

Which quantum number reveal information about the orientation of an orbital?

• spin quantum number

• magnetic quantum number

• principle quantum number

• none of these

What is the spin quantum number value of the electron present in the 2s¹ orbital?

• -1/2

• -1

• +1/2

• +1

What is the azimuthal quantum number (l) value for the 4f orbital?

• 2

• 1

• 0

• 3

What are the possible m_l values of 2p orbital?

• +1,0,-1

• 0

• +2,+1,0

• 0,-1,-2