Join 60,000+ competitive exam aspirants
Which of the following is a simple monocarboxylic acid containing two carbons?
Palmitic acid (C16тАЛH32тАЛO2тАЛ)
Acetic acid (C2тАЛH4тАЛO2тАЛ)
Capric acid (C10тАЛH20тАЛO2тАЛ)
Valeric acid (C5тАЛH10тАЛO2тАЛ)
Acetic acid (C2тАЛH4тАЛO2тАЛ)
Acetic acid, also known as ethanoic acid, is a simple monocarboxylic acid containing exactly two carbon atoms in its molecule. Its structure consists of a methyl group (CH3тАЛ) attached to a carboxyl functional group (тИТCOOH).
Acetic acid, also known as ethanoic acid, is a simple monocarboxylic acid containing exactly two carbon atoms in its molecule. Its structure consists of a methyl group (CH3тАЛ) attached to a carboxyl functional group (тИТCOOH).
Acetic acid is the main component of vinegar; just as vinegar has a distinct sharp, sour smell, it is the simplest acid one typically encounters in a kitchen environment.
Remember 'Ace' sounds like 'Two' in some card contexts, but chemically, Acetic acid = 2 carbons (Eth- prefix).
CH3тАЛCOOH тАФ Chemical formula of Acetic Acid
CnтАЛH2nтАЛO2тАЛ тАФ General formula for saturated monocarboxylic acids
Carboxylic acids are defined by the presence of the тИТCOOH functional group. In the case of acetic acid, the formula CH3тАЛCOOH indicates the first carbon is part of the methyl group and the second carbon is the carbonyl carbon within the carboxyl group. It is the second member of the homologous series of alkanoic acids, following formic acid (HCOOH).
Acetic acid is a weak acid with a pKaтАЛ of approximately 4.76.
It is classified as a monocarboxylic acid because it contains one тИТCOOH group.
Commonly referred to as glacial acetic acid when in its pure, anhydrous form.
Used extensively in the food industry as a preservative and flavoring agent.
Serves as an essential chemical reagent in the synthesis of polymers like polyvinyl acetate.
Concentrated acetic acid is corrosive and can cause severe skin burns.
Production of vinegar (typically 5-8% acetic acid by volume).
Manufacturing of cellulose acetate and various synthetic fibers.
Palmitic acid (C16тАЛ), Capric acid (C10тАЛ), and Valeric acid (C5тАЛ) have longer carbon chains, making them incorrect choices.
IUPAC name for Acetic acid is Ethanoic acid, confirming the two-carbon structure (Eth- prefix).
B is correct тАФ Acetic acid is a two-carbon carboxylic acid represented by the chemical formula CH3тАЛCOOH.
For competitive exams, always link the prefix (Meth-, Eth-, Prop-, But-) to the number of carbons to quickly identify the carboxylic acid structure.