AP Chemistry - Unit 2 - Part 2

Which of these molecules has a shape related to a tetrahedron (or has sp³ bonding)?



• CBr₄ and NH₃

• PF₅

• NH₃ and HCN

• SO₃

Which of these molecules has the largest bond angle?



• HCN

• PF₅

• NH₃

• SO₃

The observation that the bond lengths found in the carbonate ion are equal is due to

• resonance structures

• hvbridization of the central atom

• the presence of ionic bonds

• the existence of lone pairs of electrons

Which of these molecules have all atoms lying in the same plane?

• CBr₄ and NH₃

• PF₅

• NH₃ and HCN

• SO₃ and HCN

Which of the following molecules are paired correctly with their molecular geometry?

• PF₅, tetrahedron

• XeF₄, square planar

• CCI₄, trigonal pyramid

• SF₆, square pyramid

In which of the following are the elements listed in order of increasing electronegativity?

• Ba, Zn, C, CI

• N, O, S, CI

• N, P, As, Sb

• K, Ba, Si, Ga

The difference in bond angles for SBr₂ PBr₃, and CBr₄ is due to

• the dissimilarity in bond polarity between the central atom and bromine

• the size of the central atom

• the presence of several lone pairs of electrons

• the variance in bond length and strength

For which of the following may we draw both polar and nonpolar Lewis structures?

• CHCl₃

• NH₃

• BF₃

• SF₂Cl₄

Which of the following has the fewest pi bonds and is nonpolar?

• HCCH

• CO₂

• CO₃^2-

• N₂

The following diagram is an incomplete Lewis structure.

What does the complete Lewis structure for the diagram have?

• Both polar and nonpolar bonds

• At least one double bond

• Resonance forms

• At least one lone pair of electrons on each atom