Multiple choice

Which of the following statements is correct about Lucas test?

  1. Tertiary alcohol produces the turbidity immediately.

  2. Alkyl iodide reacts with silver nitrite to form the corresponding nitroalkane.

  3. Primary alcohol gives turbidity within 5 to 10 minutes.

  4. Carbonyl gets reduced into alcohol by using alcoholic sodium.

  5. Iodoform decomposes to free iodine when in contact with organic matter.
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A Correct answer
Explanation

This option is correct because Lucas reagent is a mixture of conc. HCl and anhydrous zinc chloride at room temperature, in which the tertiary alcohols are insoluble. These  produce turbidity immediately.

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