Organic Chemistry Question?

[chemquestions]

Which of the following is a bridged bicyclic alkane (i.e. the "bridge" has at least one carbon in it)?
A. cis-decalin
B. bicyclo[2.2.1]heptane
C. bicyclo[3.2.0]heptane
D. bicyclo[4.1.0]heptane
E. none of these

If a cyclic alkane hydrocarbon contains n carbon atoms, how many hydrogen atoms must it also contain?
A. n - 2
B. n + 2
C. 2n + 2
D. n
E. 2n

Which of the following is not a possible termination step in the free radical chlorination of methane?
A. CH3 + Cl CH3Cl
B. CH3 + CH3 CH3CH3
C. CH3 + Cl2 CH3Cl + Cl
D. Cl + wall Cl-wall
E. CH3 + wall CH3-wall

How many distinct dichlorination products can result when isobutane is subjected to free radical chlorination?
A. 3
B. 4
C. 2
D. 6
E. 1

Energy is _____when bonds are formed and is _____when bonds are broken; therefore, bond dissociation energies are always _____.
A. consumed/released/endothermic
B. released/consumed/endothermic
C. released/consumed/exothermic
D. consumed/released/exothermic
E. consumed/released/isothermic