Chemistry Questions:
1. A triangular planar molecule will have ______ unshared pair(s) of electrons on the central atom.
a. 0
b. 1
c. 2
d. 3
e. 4
2. The correctly drawn Lewis formula for NH2OH will have ______.
a. 3 single bonds and 3 pairs of nonbonding electrons
b. 4 single bonds and 3 pairs of nonbonding electrons
c. 3 single bonds, 1 double bond, and 2 pairs of nonbonding electrons
d. 2 single bonds, 2 double bonds, and 2 pairs of nonbonding electrons
e. 4 single bonds and 2 pairs of nonbonding electrons
3.When there are extra electrons available in a Lewis structure they:
A. are used to make double bonds in the molecule.
B. are used to make triple bonds in the molecule.
C. become nonbonding pairs of electrons.
D. are the most reactive electrons.
E. don't affect the molecular geometry.
4.Which of these molecules or ions has a violation of the octet rule (other than H)?
A. BCl3
B. F2
C. PH3
D. NO3‾
E. SF2
5.Which of these molecules or ions has a violation of the octet rule (other than H)?
A. C2H4
B. NH3
C. SO2
D. MgBr2
E. Cl2
6.Which of these molecules or ions has a violation of the octet rule (other than H)?
A. CO
B. H2O
C. PCl5
D. Br2
E. NH3