Fog is a colloidal system ofa)Gas in liquidb)Liquid in gasc)Gas in gasd)Gas in solidCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

When a large mass of air containing dust particle is cooled below its dew point, the moisture from the air condenses on the surface of these particles forming fine droplets. These droplets being colloidal in nature continue to float in air in the form of fog or mist
Fog is an example of aerosol in which dispersed phase is liquid and dispersion medium is gas. Hence, option B is correct.

Answer

Fog is a colloidal system of liquid in gas type...dispersed phase is liquid and dispersion medium is gas

Answer

Fog is a colloidal system of liquid in gas.

Fog is a natural phenomenon that occurs when tiny water droplets are suspended in the air. It is essentially a type of cloud that forms close to the ground. Fog is commonly observed in areas with high humidity and when the temperature drops significantly, causing the air to cool and reach its dew point.

Definition of a colloidal system:
A colloidal system is a heterogeneous mixture in which particles of one substance are dispersed evenly throughout another substance. The particles in a colloidal system are generally larger than individual molecules but smaller than what can be seen with the naked eye. These particles are called colloids.

Fog as a colloidal system:
Fog is considered a colloidal system because it consists of tiny liquid water droplets suspended in a gas, which in this case is air. The water droplets in fog are so small that they can remain suspended for long periods of time, giving the appearance of a cloud at ground level.

Formation of fog:
Fog forms when warm, moist air comes into contact with a cooler surface or air mass. As the warm air cools, it loses its ability to hold moisture, causing the water vapor to condense into tiny liquid droplets. These droplets then become suspended in the air, forming fog.

Characteristics of fog as a colloidal system:
1. The fog particles (liquid water droplets) are dispersed throughout the air, giving the fog a cloudy appearance.
2. The size of the water droplets in fog is typically between 1 and 100 micrometers.
3. The fog particles do not settle down due to their small size and the constant movement of air.
4. Fog can be visually identified by reduced visibility, as the suspended water droplets scatter and absorb light, making objects appear blurry or obscured.

Conclusion:
In conclusion, fog is a colloidal system of liquid in gas. It consists of tiny liquid water droplets suspended in the air, forming a cloudy appearance. Understanding the nature and formation of fog helps us appreciate this natural phenomenon and its impact on visibility and weather conditions.

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