Gen. Chem. - Chap. 7
Choose the correct answer for each question.
 

1The number of valance electrons in an O atom is...
2
4
6
8

2The Lewis structure for CO would predict...
A single bond between the C and the O
A triple bond between the C and the O
14 valence e-
2 unshared pairs of e- on the O

3Which of the following molecules or ions can have resonance structures?
NO3-
CO32-
BF3
Both a and b.

4The expected shape for AsBr5 is...
trigonal bipyrimidal
square planar
square pyrimidal
see-saw

5The geometry for a molecule with a VSEPR formula of AX4E2 is...
trigonal pyrimidal
tetrahedral
octahedral
square planar

6The shape and bond angle for an AX4 molecule is...
tetrahedral, 90
tetrahedral, 109.5
square planar, 90
octahedral, 90

7The VSEPR formula for a XeF3- ion is...
AX3
AX3E
AX3E2
AX3E3

8Which of the following molecules is not polar?
NH4+
CHCl3
NH3
H2O

9The hybridization on the N atom in NH3 is...
sp
sp2
sp3
sp3d

10The total number of sigma and pi bonds in the N3- ion (N=N=N)- are...
0 sigma, 4 pi
1 sigma, 3 pi
2 sigma, 2 pi
4 sigma, 0 pi