VSEPR Theory

Ammonia, NH₃, adopts a tetrahedral geometry. However, the non-bonding pair on the central nitrogen atom distorts the bond angle away from the expected 109.5°. Which of the following statements correctly describes how the bond angle is distorted?

• The actual bond angle is reduced: it is less than 109.5°

• The actual bond angle is increased: it is more than 109.5°

Choose the correct shape for this molecule:

• linear

• Trigonal pyramidal

• Bent

• Tetrahedral

*

• trigonal pyramid

• linear

• bent

• angular

What molecule could this be? 

• H₂O

• CCl₄

• PCl₅

• NaCl

Tags

NGSS.MS-PS1-1

The Lewis Dot diagram for hydronium H₃O⁺ is shown on the left. What shape is the molecular geometry?

• trigonal planar

• linear

• tetrahedral

• trigonal pyramidal

Which of the following molecular shapes would have a bond angle of 180 Degrees?

• Bent

• Trigonal Planar

• Tetrahedral

• Linear

Lone pairs of electron ​ (a)   other electron pairs ​​ (b)   strongly than bonded pairs. This ​ (c)   the bond angle.​

• repel

• more

• reduces

• attract

• less

• increases

How many lone pairs of electrons are on the P atom in PF3?

• 1

• 2

• 3

• 0

How many unshared pairs of electrons will a bent molecule have? 

• 1

• 2

• 3

• 4

Why is the bond angle in NH₃ molecule is smaller than that in CH₄ molecule?

• Among the four electron pairs around the central atom N in NH₃

  molecule, there are two lone pairs which require more space than bonding pairs and tend to compress the angles between the bonding pairs.

• Among the four electron pairs around the central atom N in NH₃

  molecule, there is one lone pair which requires more space than a bonding pair and tends to compress the angles between the bonding pairs.

• Among the four electron pairs around the central atom N in NH₃

  molecule, there is one lone pair which requires less space than bonding pairs and tend to increase the angles between the bonding pairs.

• In reality, bond angle in NH₃ molecule is larger than that in CH₄ molecule.