Question

Acetaldehyde cannot show

• A. lodoform test
• B. Lucas test
• C. Benedict's test
• D. Toilers test

Answer 1

Answer: (B)

Lucas test

Answer 2

Acetaldehyde cannot show Lucas test because Lucas test is given by alcohols only. It is used in the distinction between primary, secondary and tertiary alcohols. Conc. $HCl +$ anhydrous $ZnCl_{2}$ is called Lucas reagent.