Molecular Polarity

A molecule is polar when

• it is asymmetrical with at least one polar bond

• it is symmetrical

• it is asymmetrical

• it is symmetrical with at least one polar bond

Use your knowledge and electronegativity sheet to predict what the following compound is classified as.

• nonpolar covalent

• polar covalent

• ionic

• metallic

Which of the following is a polar molecule?

• CH₄
• Xe
• H₂O
• CO₂

Which phrase correctly describes the distribution of charge and the molecular polarity of ethane?

• symmetrical and polar
• asymmetrical and polar
• asymmetrical and nonpolar
• symmetrical and nonpolar

Which of the following geometries could be nonpolar?

• bent
• tetrahedral
• trigonal pyrimidal
• none of the above

Which formula represents a nonpolar molecule?

• HBr
• H₂S
• CBr₄
• PCl₃

Which of the following molecules, based on the elements present, would be most polar?

• HF
• H₂
• HCl
• HBr

Which statement explains why ethene does not dissolve in water?

• Ethene is polar and water is nonpolar.
• Ethene is nonpolar and water is nonpolar.
• Ethene is polar and water is polar.
• Ethene is nonpolar and water is polar.

Which molecule would be most soluble in water?

• Solid iodine, I_2(s)
• Glucose, C₆H₁₂O_6(s)

A molecule containing polar covalent bonds is always polar.

• True
• False