question_answer

Among the following pairs, the pair that illustrates stereoisomerism is

A)  1-butanol and 2-butanol

B)  cis-2-butene and trans-2-butene

C)  dimethyl ether and ethanol

D)  acetone and propanal

E)  ethanol and ethanol

Correct Answer: B

Solution :

But-2-ene shows stereoisomerism and can exist in the following two forms: Both these isomers have the same structural formulae but differ in the relative spatial arrangement of hydrogen atoms and methyl groups around the double bond.