Question

Acetaldehyde cannot give:

• A. Iodoform test
• B. Lucas test
• C. Fehling's test
• D. Tollen's test

Answer 1

The correct option is B Lucas test

Acetaldehyde gives positive result with Iodoform test, Fehling's test and Tollen's test.
Lucas test is given by alcohols. It is used to distinguish between primary, secondary and tertiary alcohols.
$\text{conc.}HCl+\text{anhydrous}ZnC{l}_2$ is called Lucas reagent.