How many Carbons are there in STEARIC ACID?
Correct answer: B. 18
- A. 15
- B. 18
- C. 05
- D. 07
Explanation
Stearic acid, with the chemical formula C18H36O2, contains 18 carbon atoms. This is evident from the subscript '18' following the carbon symbol (C) in the formula. The incorrect options (15, 05, and 07) do not match the number of carbon atoms in the molecular structure of stearic acid.
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About Nomenclature, Structure and Preparation
Carboxylic acids are prepared by oxidising primary alcohols or aldehydes, hydrolysing nitriles, esters and amides, and carbonating suitable organometallic compounds. Their structures, IUPAC naming, resonance stabilisation and acidic character explain why carboxylic acids differ from alcohols and phenols, despite all containing oxygen and hydrogen.
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