Chemical Bonding and Molecular Structure

Predict the correct order among the following.

• long pair-lone pair> bond pair-bond pair> lone pair>bond pair

• bond pair-bond pair> lone pair-bond pair > lone pair -lone pair

• lone pair -bond pair > bond pair- bond pair> lone pair -lone pair

• lone pair -bond pair > bond pair- bond pair> lone pair -lone pair

The pair of an electron in the given carbanion, is present in which orbital? 

• sp³

• sp²

• sp

• sp

Consider the molecules CH₄, NH₃ and H₂O. Which of the given statement is false?

• The H-O-H bond angle in H₂O  is larger than the H-C-H bond angle in CH₄.

• The H-O-H bond angle in H₂O is smaller than the H-N-H bond angle in NH₃.

• The H-C-H bond angle in CH₄ is larger than the H-N-H bond angle in NH₃

• The H-C-H bond angle in CH₄ is larger than the H-N-H bond angle in NH₃

Which of the following species contains an equal number of σ and Π bond? 

• HCO₃^-

• XeO₄

• (CN)₂

• (CN)₂

Consider the following compounds


Hyperconjugation occurs in 

• I only

• II only

• III only

• III only

The enolic form of ethyl acetoacetate as below has

• 18 sigma bonds and 2 pi-bond

• 16 sigma bonds and 1 pi-bond

• 9 sigma bonds and 2 pi-bond

• 9 sigma bonds and 2 pi-bond

The total number of Pi bond electrons in the following structure is

• 4

• 8

• 12

• 12

The pair of compounds that can exist together is 

• FeCl₃.SnCl₂

• HgCl₂,SnCl₂

• FeCl₂,SnCl₂

• FeCl₂,SnCl₂

Which of the following molecules has the maximum dipole moment?

• CO₂

• CH₄

• NH₃

• NH₃

Which one of the following species has the plane triangular shape?

• N₃

• NO₃^-

• NO₂^-

• NO₂^-