Question 9
The Soap molecule has a
(a) Hydrophilic head and hydrophobic tail
(b) Hydrophobic head and hydrophilic tail
(c) Hydrophobic head and hydrophobic tail
(d) Hydrophilic head and hydrophilic tail
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Solution
The answer is (a), Hydrophilic head and hydrophobic tail.
Hydrophilic head - polar head pointing towards water (water attracting).
Hydrophobic tail - nonpolar tail pointing towards dirt (water-repelling).