Question

In preparation of alkene from alcohol using $Al_2 O_3$, which is effective factor?

• A. Porosity of $Al_2 O_3$
• B. Temperature
• C. Concentration
• D. Surface area of $Al_2 O_3$

Answer 1

Answer: (B)

Temperature

Answer 2

Temperature is the effective factor.

When it comes to dehydration of alcohols the optimum temperature is between 220 to 250 degrees. Then it will form ether.

R-CH2-CH2-OH → R-CH+CH2 +H2O

The reaction takes place in the presence of Al2O3 at 350 to 380 degrees.