Select all correct statements about detergents.

ASodium lauryl sulphate is an anionic detergent with an $- OSO X_{3} -$ head.
BCetyltrimethylammonium bromide is cationic, with a positively charged nitrogen head.
CPolyethylene glycol stearate ionises in water to give stearate anions.
DA linear alkyl chain makes a detergent more biodegradable than a branched chain.

Answer: A, B, D

Sodium lauryl sulphate has the sulphate head and is anionic (a true). The quaternary ammonium compound is cationic (b true). Polyethylene glycol stearate is an ester and does not ionise (c false). Linear chains are degraded faster (d true).

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