MDCAT Chemistry MCQ #633

Methyl magnesium bromide is reacted with dry ice (CO2) and separately with formaldehyde (HCHO). Contrast the functional groups of the two organic products.

MDCAT Chemistry MCQ #633

  1. Question 1

    Q1. Methyl magnesium bromide is reacted with dry ice (CO2) and separately with formaldehyde (HCHO). Contrast the functional groups of the two organic products.

    • A) Acetic acid is formed from CO2; Ethanol is from HCHO.
    • B) Methanol is formed from CO2; Acetic acid is from HCHO.
    • C) Ethane is formed from CO2; Methane is from HCHO.
    • D) Acetone is formed from CO2; Acetaldehyde is from HCHO.

    Answer: Acetic acid is formed from CO2; Ethanol is from HCHO.

    Explanation: Reaction with CO2 yields a carboxylic acid with one extra carbon, whereas reaction with aldehydes or ketones yields various alcohols.