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Question

How does soap help in cleaning greasy clothes?

This question was previously asked in
RRB Technician 2026 Grade 3 Question Paper (7-Oct-2026) (Shift 3)
The correct answer is

It forms micelles that trap grease and wash it away

A soap molecule has a long hydrocarbon tail (hydrophobic, attracted to oil) and an ionic head (hydrophilic, attracted to water).

In water, the tails dissolve in the grease and the heads face outward, forming spherical clusters called micelles with the grease trapped inside.

The micelles stay suspended in water and are rinsed away, carrying the dirt with them.

Hence, it forms micelles that trap grease and wash it away.

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Similar Questions

  1. Which of the following statements best describes a characteristic shared by all organic compounds?

  2. Why are saturated hydrocarbons generally unreactive under normal conditions?

  3. Which of the following is NOT a branched alkane?

  4. The element commonly referred to as the "building block of life" is:

  5. Which carbon compound is least likely to undergo an addition reaction?

  6. Which statement correctly describes an addition reaction?

  7. Which statement best describes the function of micelles formed by soaps in water?

  8. Which of the following best describes what happens when ethanol undergoes complete combustion in air?

  9. Which of the following is an example of a compound with a ring structure?

  10. Why does incomplete combustion of hydrocarbons reduce energy efficiency?


Important Questions from Organic Chemistry

  1. A carbon compound when heated in excess of concentrated sulphuric acid at 443K gives ethene. The compound is an________.

  2. Plastic is not related to which of the following

  3. The Peroxyacetyl Nitrate (PAN) is:

  4. Which one of the following is the chemical name of heavy water ?

  5. Which of the following alkanes contains primary ($1^\circ$), tertiary ($3^\circ$), and quaternary ($4^\circ$) carbons, but no secondary ($2^\circ$) carbons?

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