Bright Tutorials Bright Tutorials
CBSE Class 10 Science Question 4 of 15

Carbon and its Compounds — Question 8

Back to all questions
8
Question

Question 8

Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents, such as ethanol also?

Answer

Soaps are molecules in which the two ends have differing properties, one is hydrophilic (water attracting), that is, it interacts with water, while the other end is hydrophobic (water repelling), that is, it interacts with hydrocarbons. Inside water, the soap molecules arrange themselves in a cluster in such a way that the hydrophobic tails are in the interior of the cluster and the hydrophilic (ionic) ends are on the surface of the cluster. This formation is called a micelle.

No, micelle formation does not take place in ethanol because the hydrocarbon chains (hydrophobic) of soap becomes soluble in ethanol.

Web Content: Carbon and Its Compounds | Bright Tutorials
BRIGHT TUTORIALS
Bright Tutorials Logo
BRIGHT TUTORIALS
CBSE Class X | Academic Year 2026-2027
9403781999
Excellence in Education
Science | Chapter 4: Carbon and Its CompoundsWeb Content

Chapter 4: Carbon and Its Compounds — Quick Revision Guide

Introduction

Carbon is unique in its ability to form millions of compounds due to catenation and tetravalency. This chapter covers covalent bonding, hydrocarbons, homologous series, IUPAC nomenclature, and important carbon compounds.

Key Points at a Glance

  1. Carbon (2,4) forms 4 covalent bonds (sharing electrons) due to tetravalency
  2. Catenation: carbon-carbon bonding in chains, branches, and rings; allotropes: diamond, graphite, fullerene
  3. Hydrocarbons: alkanes (CnH2n+2, single), alkenes (CnH2n, double), alkynes (CnH2n−2, triple)
  4. Homologous series: same general formula, differ by CH2, similar chemical properties, gradation in physical properties
  5. IUPAC naming: root (meth/eth/prop/but) + suffix (-ane/-ene/-yne) + functional group suffix (-ol/-al/-one/-oic acid)
  6. Combustion: hydrocarbons + O2 → CO2 + H2O; saturated = clean flame, unsaturated = sooty
  7. Oxidation: alcohols → aldehydes/acids (alk. KMnO4); Addition: unsaturated + H2 → saturated (Ni catalyst); Substitution: saturated + Cl2 → chlorinated (sunlight)
  8. Ethanol: fermentation of sugars; dehydration gives ethene; methanol is lethal
  9. Ethanoic acid (vinegar): reacts with carbonates, alcohols (esterification: produces fruity-smelling ester)
  10. Soap vs detergent: soap fails in hard water (scum); detergent works; both clean via micelle formation

Real-World Connections

LPG and CNG are hydrocarbon fuels; synthetic polymers (plastic, nylon) are carbon compounds; vanaspati ghee is made by hydrogenation; soaps and detergents for cleaning; alcohol in sanitisers.

Quick Self-Test (5 Questions)

  1. What is the most important concept you learned from this chapter?
  2. Can you write three key equations/formulae from this chapter from memory?
  3. Draw a labelled diagram relevant to this chapter without looking at your notes.
  4. Explain one real-world application of a concept from this chapter.
  5. What is one common mistake students make in this chapter, and how can you avoid it?

Further Study

  • NCERT Textbook Chapter 4
  • NCERT Exemplar Problems
  • Bright Tutorials Detailed Notes: ch04-carbon-compounds.html
  • Bright Tutorials Practice Questions: ch04-carbon-compounds.html
  • Previous Year CBSE Board Papers

Bright Tutorials | Hariom Nagar, Nashik Road | 9403781999 | brighttutorials.in