allerySoap molecules in water form micelles because:
ATheir entire body is hydrophobic under typical conditions
BThey have a hydrophilic head and a hydrophobic tail
CWater expels them in general usage
DThey have ionic chains throughout
Answer & Solution
Correct answer: B. They have a hydrophilic head and a hydrophobic tail
1. Soap molecules have two distinct ends.
2. The hydrocarbon tail is non-polar (hydrophobic).
3. The carboxylate head is polar and ionic (hydrophilic).
4. In water, tails huddle together and heads face outward.
5. The resulting spherical clusters are called micelles.
6. Micelles trap oil droplets inside the tail cluster, enabling cleaning.
_Source: syllabus Science Ch 4 'Carbon and its Compounds' (byjus.com extract)_
Keep practising Light and Sound
Browse all Light and Sound questions for Andhra Pradesh SSC (Class 10), or explore more Physics topics.
Related questions
Match the indicator test to its colour changeThe correct electron dot structure of a water molecule isHow many isomers exist for the molecular formula C4H10?Chlorine reacts with saturated hydrocarbons at room temperature in theIdentify the unsaturated compounds from the following (i) Propane (ii) Propene (iii) PropyWhich alkane is added to LPG to make it detectable through smell?Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. Buckminsterfullerene is an allotropic form of