the following is hydrophobic colloid (a) Gelatin (b) Gum (c) starch(d) sulphar
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Sulphur is the example of hydrophobic colloid. Thus, the correct option is (d).
What are Hydrophobic colloids?
- Hydrophobic is derived from the word 'hydro' means 'water' and 'phobic' means 'fear of'. Thus, hydrophobic means repelling water.
- Hydrophobic colloid is the colloidal system which does not interrelate with water.
- Hydrophobic clouds are haters of water.
- These are unstable colloids and get their stability by absorption of ions.
- They do not form spontaneously.
- Some examples are Oil, fats, greasy substances and some organic compounds.
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The correct answer is option (d) Sulphur.
Explanation:
- Sulphur is hydrophobic colloid.
- A hydrophobic colloid, or emulsion, is defined as a colloid system where the colloid particles are hydrophobic polymers.
- Hydrophobic colloids do not interact with water, so they are inherently unstable and generally do not form spontaneously.
- Apart from sulphur, all other molecules are hydrophilic in nature due to longer chain structure (having polarity).
- But sulphur is hydrophobic as inorganic sols are usually hydrophobic in nature.
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