A) Glyceryl oleate
B) Sodium stearate
C) Sodium lauryl sulphate
D) Cetyltrimethyl ammonium bromide
Correct Answer: C
Solution :
(1) Anionic detergent : \[C{{H}_{3}}-{{(C{{H}_{2}})}_{10}}-C{{H}_{2}}-O-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{S}}}\,-{{O}^{\Theta }}N{{a}^{\Theta }}\] Sodium Lauryl sulfate is example of anionic detergent These are sodium salts of sulphonated long chain alcohols or hydrocarbons. \[C{{H}_{3}}-{{(C{{H}_{2}})}_{10}}-C{{H}_{2}}-OH\xrightarrow[(conc.)]{{{H}_{2}}S{{O}_{4}}}\] \[C{{H}_{3}}-{{(C{{H}_{2}})}_{10}}-O\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{S}}}\,-OH\xrightarrow[{}]{NaO{{H}_{(aq)}}}\] \[C{{H}_{3}}-{{(C{{H}_{2}})}_{10}}-O-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{S}}}\,-{{O}^{\Theta }}N{{a}^{\Theta }}\] Sodium lauryl sulphate (anionic detergent) (2) Cationic detergent
Cetyle trimethyl ammonium bromide is an example of cationic detergent (3)\[{{C}_{17}}{{H}_{35}}C{{O}_{2}}Na:\] Sodium sterarate (soap)
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