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

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

Which one ofthe following compounds has sp² hybridisation ?

• CO₂

• SO₂

• N₂O

• CO

Number of lone pair (s) in XeOF₄ is/are

• 0

• 2

• 1

• 3

899.

BCl₃ is a planar molecule, while NCl₃ is pyramidal, because

• N-Cl bond is more covalent than B-Cl bond

• nitrogen atom is smaller than boron atom

• B-Cl bond is more polar than NCl bond

• BCl₃ has no lone pair of electrons but NCl₃ has a lone pair of electrons.

The correct sequence of hybridisation of methane, ethene and acetylene is :

• sp, sp², sp³

• sp², sp³, sp

• sp³, sp², sp

• sp³, sp, sp²