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Question

Detergents are prepared by the action of H2SO4 followed by neutralization by starting with

A
chlorestrol
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B
lauryl alcohol
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C
cylcohexanol
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D
p-nitrophenol.
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Solution

The correct option is B lauryl alcohol
Anionic detergents are sodium salts of sulphonated long chain alcohols or hydrocarbons. Alkyl
hydrogensulphates formed by treating long chain alcohols with concentrated sulphuric acid are neutralised with alkali to form anionic detergents.
CH3(CH2)10CH2OH (Lauryl alcohol)+H2SO4 CH3(CH2)10CH2OSO3H + aq. NaOH CH3(CH2)10CH2OSO3 Na+

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