sfp Molecular Geometry and Polarity Revision

What is the main reason CF₄ is nonpolar?

• CF₄ is polar because it has a linear shape.
• CF₄ is nonpolar due to its symmetrical tetrahedral shape, causing dipole moments to cancel.
• CF₄ is nonpolar due to the presence of lone pairs on carbon.
• CF₄ is polar because of unequal electronegativity between carbon and fluorine.

Fill in the blank: CF₄ has a tetrahedral structure, with bond angles of ____.

• 109.5°

• 90°

• 120°

• 180°

Which of the following is a symmetrical/nonpolar molecule?

• A) Bent (AX₂E or AX₂E₂)

• B) Trigonal Pyramidal (AX₃E)

• C) Linear (AX₂)

• D) Trigonal Pyramid (AX₃)

Nonpolar molecules can have polar bonds because:

• they have an equal distribution of electrons.

• they have an unequal distribution of electrons.

• the polar bonds cancel each other out.

• the polar bonds do not affect the overall polarity.

What is the electronegativity difference between carbon and oxygen in carbon dioxide?

• The electronegativity difference between carbon and oxygen in carbon dioxide is approximately 0.8

• The electronegativity difference between carbon and oxygen in carbon dioxide is approximately 0.5.

• The electronegativity difference between carbon and oxygen in carbon dioxide is approximately 2.5.

• The electronegativity difference between carbon and oxygen in carbon dioxide is approximately 3.0.

Why is CF₄ nonpolar despite having polar bonds?

• The bonds are equally strong.

• The molecule contains fluorine.

• The molecule has a symmetrical shape.

• Carbon is electronegative.

What is the molecular geometry of Methane (CH4)?

• Linear

• Tetrahedral

• Trigonal Planar

• Bent

The bond angle in Methane (CH4) is ______ degrees.

• 109.5

• 120

• 90

• 180

• Nonpolar bond

• 
  x ≤  0.4 “equal” sharing of electrons

• 0.4 x ≤ 1.7 unequal sharing of electrons

• x ≤ 1.7 transfer of electrons

• x > 1.7 transfer of electrons

• polar bond

• 
  x ≤  0.4 “equal” sharing of electrons

• 0.4 x ≤ 1.7 unequal sharing of electrons

• x ≤ 1.7 transfer of electrons

• x > 1.7 transfer of electrons