Question

The best method to prepare cyclohexene from cyclohexanol is by using

• A. conc. $HCl+ZnC{l}_2$
• B. conc. $H_{3}P{O}_4$
• C. $HBr$
• D. conc. $HCI$

Answer 1

Answer: (B)

Concentrated $H_{3}P{O}_4$ solution does not involve any substitution product while with others, substitution products are also formed