A) RCl, and RBr but not RF or RI
B) RF. RCl and RBr but not RI
C) RF, RCl, RBr, RI
D) RF, RCl and RI but RBr
Correct Answer: A
Solution :
\[RCl\] and \[RBr\] can be prepared by free radical halogenation of alkanes while RF and RI cannot be prepared. With \[{{F}_{2}}\], the reaction is not only explosive but also brings cleavage of \[C-C\] bonds while with \[{{I}_{2}}\] the reaction is too slow to be of any practical value,
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