Exams › JEE Main › Chemistry

Among the following the one that gives positive iodoform test upon reaction with I2 and NaOH is

1. CH3–CH(CH3)CH2OH
2. CH3CH2CH2OH
3. CH3CH2OH
4. CH3OCH2CH3

Correct answer: CH3CH2OH

Solution

A positive iodoform test requires a CH3-CO- or CH3-CH(OH)- group. Among the choices only CH3CH2OH (ethanol) qualifies; n-propanol, isobutanol and the ether do not.

Related JEE Main Chemistry questions

• Why is ortho-nitrophenol less soluble in water than the meta- and para-nitrophenol isomers?
• Which of the following structures represents vinylcarbinol?
• Which of the following is NOT a starting material used for the preparation of iodoform?
• Iodoform is formed from all of the following except:
• Which reagent can convert CH3CH2OH into CH3CHO?
• Which reagent can be reacted with phenylmagnesium bromide to obtain 2-phenylethanol?

⚔️ Practice JEE Main Chemistry free + battle 1v1 →