Acetaldehyde can not exhibit which of the following reaction?

Iodoform test

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Luca's test

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Benedict test

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Tollen's test

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Solution

The correct option is B Luca's test
Acetaldehyde cannot exhibit Lucas's test.
This test only performs to differentiate between primary and secondary and tertiary alcohol. Luca's reagent is a solution of $Z n C l_{2}$ (Anhydrous) and $H C l$ acid. Acetaldehyde does not undergo reaction with Luca's reagent.
$C H_{3} C H O Z n C l_{2} / H C l - ------ \to N o r e a c t i o n$

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