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Question
Which of the following are anionic detergents?
(i) Sodium salts of sulphonated long-chain alcohol.
(ii) Ester of stearic acid and polyethylene glycol.
(iii) Quarternary ammonium salt of amine with acetate ion.
(iv) Sodium salts of sulphonated long-chain hydrocarbons.
Solution
(i) Sodium salts of sulphonated long-chain alcohol.
(iv) Sodium salts of sulphonated long-chain hydrocarbons.
Explanation:
Sodium salts of sulphonated long-chain alcohol and sodium salts of sulphonated long-chain hydrocarbons are anionic detergents e.g., Sodium lauryl sulphate \[\ce{CH3(CH2)10CH2OSO3– Na+}\] and sodium dodecylbenzene sulphonate.
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