1. Compound A has a molecular formula C4H9Cl. Compound A reacts
with Y in ethanol to give 1-butene, which when reacted with
Br2/H2O gives compound B. Which of the following statements
is true?
a. B could be 1,2-dibromobutane and Y could be KOH
b. A could be 1-chlorocyclobutane and Y could be H2/Pt
c. B could be 1-bromo-2-butanol and Y could be KOH
d. A could be 1-chlorobutane and Y could be H+
e. B could be 2-bromo-1-butanol and Y could be H2/Pt
2. Which of the following compounds contain conjugated systems?
estrone; cycloocta-1,3,5-triene; 2-cyclopentenone; 3-buten-2-one; 2,5-dimethylhexa-2,4-diene
a. all of the above
b. estrone only
c. 2-cyclopentenone only
d. 2,5-dimethylhexa-2,4-diene only
e. none of the above