Chemistry

1. In the bromination of n-butane, the secondary hydrogens are 20 times more reactive than the primary hydrogens. What is the product ratio of 1-bromobutane to 2-bromobutane?  
a.  6:4  
b. 1:20  
c.93:7  
d. 7:93  

2.  Rank the free radicals (I-III) shown below in order of decreasing stability (ie, most stable to least stable).
CH2-CH2-CH-(CH3)2 I

CH3-CH2- C-(CH3)2 II

CH3-CH-CH-(CH3)2 III  
a. I > II > III  
b. III > II > I  
c.  II> I > III  
d.  II > III > I