1.

Which one of the following is NOT a synthetic detergent ?

Answer»

`CH_(3)(CH_(2))_(10)CH_(2)OSO_(3)^(-)Na^(+)`<BR>`[CH_(3)(CH_(2))_(15)-N-(CH_(3))_(3)]^(+) Br^(-)`
`CH_(3)(CH_(2))_(16)COO^(-)Na^(+)`
`CH_(3)(CH_(2))_(16)COO(CH_(2)CH_(2)O)_(n)CH_(2)CH_(2)OH`

Solution :A synthetic DETERGENT is the sodium salt of sulphonic acid which has cleansing properties in water. It consists of a long hydrocarbon chain which is hydrophobic and a SHORT ionic part which is hydrophilic. Examples (i) Sodium lauryl sulphate and (ii) Sodium n-dodecyl sulphate.


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