Why B₂ is paramagnetic whereas C₂ is dimagnetic?

Dipole moment of  is 1.5 D. The dipole moment of  is

• 1.5 D

• 2.25 D

• 1 D

• 3 D

The hybridisation of C₂ and C₃ of H₃C-CH=C=CH-CH₃ are:

• sp , sp³

• sp² , sp

• sp² , sp²

• sp , sp

Hybridisation of central atom in NF₃ is

• sp³

• sp

• sp²

• dsp²

Which one of the following contains P-O-P bond?

• Hypophosphorus acid

• Phosphorus acid

• Pyrophosphoric acid

• Orthophosphoric acid

Which of the following orbitals will have zero probability  of finding the electron in the y_Z plane. 

• p_x

• p_y

• p_z

• d_yz

What type of orbital hybridisation is considered on P in PCl₅?

• sp³d

• dsp³

• sp³d²

• d²sp³

628.

The bond order of CO molecule is

• 2

• 2.5

• 3

• 3.5

The bond order in O${}_2^{-}$ ion is

• 2

• 1

• 2.5

• 1.5

The molecule having largest dipole moment among the following is :

• CHI₃

• CH₄

• CHCl₃

• CCl₄