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Q23 (NDA-II/2014) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Applied everyday chemistry Answer Verified

Which one of the following substances is most likely to be used as soap?

Result
Your answer: —  Â·  Correct: C
Explanation

Soaps are chemically defined as the sodium or potassium salts of long-chain carboxylic acids (fatty acids) [2]. These molecules possess a long hydrocarbon chain that is hydrophobic and an ionic carboxylate end that is hydrophilic, allowing them to form micelles and emulsify oils for cleaning [2]. The substance CH3(CH2)12COONa is the chemical formula for sodium myristate, which is the sodium salt of myristic acid (a C14 saturated fatty acid). Sodium myristate is explicitly identified as a surfactant and a common ingredient used in the preparation of soaps and shaving creams. In contrast, option 1 is an ester (methyl myristate), option 2 is a long-chain alkane, and option 4 is an alkyl chloride, none of which possess the required ionic salt structure of a soap [1].

Sources

  1. [1] Science , class X (NCERT 2025 ed.) > Chapter 4: Carbon and its Compounds > CH COOH CH CH OH CH C C CH CH H O 3 3 2 3 2 3 2 Acid O (E - + - - - - - + thanoic acid) (Ethanol) (Ester) O > p. 73
  2. [2] Science , class X (NCERT 2025 ed.) > Chapter 4: Carbon and its Compounds > Activity 4.10 > p. 75
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SIMILAR QUESTIONS

CDS-II · 2012 · Q90 Relevance score: 1.26

Soaps cannot be used in acidic condition because they lose their cleansing effect due to formation of insoluble

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Which among the following are the most important raw materials for manufac- turing of soap. ?

NDA-II · 2009 · Q90 Relevance score: 0.59

Consider the following statements : 1. Soap cannot be used in acidic water. 2. Ionic part of a soap is —COO~.Na+. 3. Soap dissolves in water faster than detergent. Which of the statements given above is/are correct?

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Which one of the following statements is NOT correct?

NDA-I · 2016 · Q13 Relevance score: -0.16

Soap is sodium or potassium salt of