(A) Detergents are preferred to soaps for washing purposes.
(R) Detergents having branched chain hydrocarbons are non-biodegradable.

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Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true but (R) is not the correct explanation of (A)

(A) is true but (R) is false

Both (A) and (R) are false

answer is B.

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Detailed Solution

Detergents are preferred to soaps for washing purposes due to their ability to work effectively in hard water, high efficiency in removing dirt and grease, and their ability to be used in a wide range of temperatures.
Main problem that appears in the use of detergents is that if their hydrocarbon chain is highly branched, then bacteria cannot degrade this easily.
Slow degradation of detergents leads to their accumulation.
Effluents containing such detergents reach the rivers, ponds, etc.
These persist in water even after sewage treatment and cause foaming in rivers, ponds and streams and their water gets polluted.
These days the branching of the hydrocarbon chain is controlled and kept to the minimum.
Unbranched chains can be biodegraded more easily and hence pollution is prevented.
Both (A) and (R) are true but (R) is not the correct explanation of (A).

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