Alkenes ___. a) have lower boiling points than alcohols of similar molecular wei

Question

Alkenes ___. a) have lower boiling points than alcohols of similar molecular weight b) less dense than water c) are less polar than alcohols of similar molecular weight d) all of the above By what mechanism does cyclohexanol react when treated in sulfuric acid and what compound results? a) E2; methoxycyclohexane b) S_N 1; methoxycyclohexane c) E1; cyclohexene d) E2; cyclohexene Which of the following reagents should be used to convert hex-3-yne to (E)-hex-3-ene? a) Na, NH, b) H_2, Pt c) H_2SO_4, H_2O d) HgSO_4, H_2O In the addition of hydrogen bromide to alkynes in the absence of peroxides, which of the following species is thought to be an intermediate? a) vinyl anion b) vinyl radical c) vinyl cation d) none of the above Provide the structure(s) of the major organic product(s) in the reaction below. a) i b) I & iii c) ii d) ii % iv

Explanation / Answer

Q1.

alkenes have the structural formula :

R-C=C-R

a)

therefore, they should always have a lower point than alcohols, since alochols are POLAR and fomr HYdrogen bonding (trhis is true)

b)

They can be denser than water, this depends on the amount of Carbons present

c)

less polar than alcohols true,

d)

all of above is The best option, choose D

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