PS QUIZ 4

What is the definition of a polar molecule?

 

• A molecule with a positive charge

• A molecule with a negative charge

• A molecule with a dipole or uneven distribution of charge

• A molecule with no charge

How is the slightly negative end of a polar molecule denoted?

• δ- (delta minus)

• δ+ (delta plus)

• δ (delta)

• - (minus sign)

Which molecule is considered polar?

• HCl

• BeH2

• O2

• CO2

Why is the HCl molecule polar?

• It has a positive charge on the hydrogen atom

• It has a negative charge on the chlorine atom

• It has a dipole or uneven distribution of charge

• It has no charge

Why is the BeH2 molecule nonpolar?

• It has a positive charge on the beryllium atom

• It has a negative charge on the hydrogen atoms

• The dipoles of the polar bonds cancel each other out

• It has no charge

What would happen if the water molecule was linear?

• It would be nonpolar

• It would be polar

• The bond polarities would cancel each other out

• The bond polarities would reinforce each other

Why is the water molecule polar?

• The bond polarities cancel each other out

• The bond polarities reinforce each other

• It has a positive charge on the oxygen atom

• It has a negative charge on the hydrogen atoms

What theory explains the shape of molecules?

• VSEPR

• VESPER

• VSPER

• VESPR

What does VSEPR stand for?

• Valence-Shell-Electron-Pair Repulsion

• Valence-Shell-Electron-Pair Reinforcement

• Valence-Shell-Electron-Pair Resonance

• Valence-Shell-Electron-Pair Redistribution

If a molecule has nonpolar bonds, what can we conclude about its polarity?

• It must be polar

• It must be nonpolar

• It could be either polar or nonpolar

• It depends on the shape of the molecule