Which of the following contains small droplets of liquid or particles of solid dispersed in a gas?  

Key Points

• Aerosol is a colloidal system where small droplets of liquid or particles of solid are dispersed in a gas.
• Aerosols can be naturally occurring, like mist or volcanic ash, or man-made, such as smoke or spray from aerosol cans.
• The term aerosol encompasses both the particles and the gas in which they are suspended.
• Aerosols play a significant role in various environmental and health-related issues, such as air pollution and respiratory diseases.

Additional Information

• Aerosols are used in various industries, including pharmaceuticals, agriculture, and consumer products.
• They can affect climate by scattering or absorbing sunlight and by acting as nuclei for cloud formation.
• Inhalation of certain aerosols can be harmful, leading to respiratory issues or other health problems.
• Technological advancements have led to the development of more environmentally friendly aerosol products.