Question

question 12 (1 point)
which is true of markovnikovs rule?
a) it can be used to predict the isomer that will be most plentiful in some addition reactions.
b) it states that the small molecule will attach to the carbon of the double bond that is already bonded to the most hydrogen atoms.
c) it states that a maximum of four bonding electrons can be rearranged to form bonds.
d) a and b are true.
e) a, b, and c, are true.

Explanation:

Markovnikov's rule is used in addition reactions of alkenes. It helps predict the major product (isomer) formed. According to the rule, in the addition of a protic acid \(HX\) (where \(X\) is a halogen) to an alkene, the hydrogen atom (\(H\)) attaches to the carbon atom of the double bond that has more hydrogen atoms bonded to it. So, statement \(a\) is correct as it can predict the more - abundant isomer in some addition reactions. Statement \(b\) is also correct as it correctly states the rule about the attachment of the small molecule (in the case of \(HX\) addition, the \(H\) part). Statement \(c\) is incorrect as Markovnikov's rule has nothing to do with the rearrangement of four bonding electrons to form bonds.

Answer:

D. a and b are true.