Question
Which structural unit present in a detergent makes it non-biodegradable?

Answer

Such detergents have straight hydrocarbon chains. For example: sodium lauryl sulphate Detergents thatcannot be degraded by bacteria are called non-biodegradable detergents. Such detergents have highly-branched hydrocarbon chains.
For example: sodium-4 - (1, 3, 5, 7- tetra methyl octyl) benzene sulphonate etc.

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