Alcohols Phenols And Ethers Question 299
Question: When rectified spirit and benzene are distilled together, the first fraction obtained is
Options:
A) A ternary azeotrope
B) Absolute alcohol
C) A binary azeotrope
D) Denatured spirit
Show Answer
Answer:
Correct Answer: A
Solution:
Azeotropic distillation method - Rectified spirit + Benzene + water ¯ Fractional distillation First fraction at 331.8 K is ternary azeotrope ( $ H_2O $ 7.4% + Benzene 74% + alcohol 18.5%) Second fraction 341.2 K is a binary azeotrope (Benzene 67.7% + Alcohol 32.2%) Last fraction at 351K is absolute alcohol.
BETA
