What precaution should be taken when performing the Lucas test?

Why is it important to perform the $\mathrm{CAN}$ test in a well-ventilated area or a fume hood?

Which reagent can be used to detect the presence of alcoholic groups in organic compounds?

Which precaution should be taken when conducting the Ceric Ammonium Nitrate test?

When an alcohol is treated with sulphuric acid and potassium dichromate, what colour change is observed for primary alcohols?