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I have went through each option: A) Freon is $\ce{CCl2F2},$ which is derived from methane B) Teflon is a polymer of $\ce{-F2C-CF2 -}$ (or) $\ce{(C2F4)_n},$ derivative of 1,2-difloroethene. Here, carbon is saturated, which means no double or triple bond is present. C) Iodoform is $\ce{CHI3},$ which again is a derivative of methane. D) Vinyl chloride is ...


1

According to Markovnikov's rule we would get a vicinal diiodide, which is unstable. The iodine atoms would undergo elimination and once again form a double bonded structure that is 1-propene. As to why (excess) has been mentioned, 1-propene reacts with this $\ce{HI}$ undergoing an addition reaction. As per Markovnikov's rule, this would in fact form 2-...


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