Why is air considered a mixture and not a compound? List two reasons.
BiologyClass 9CBSEAnswered 12 May 2026
Answer
Air is considered a mixture and not a compound for the following reasons:
1. Variable Composition: The composition of air is not fixed; the proportion of its constituent gases (nitrogen, oxygen, argon, carbon dioxide, etc.) can vary slightly from place to place and time to time. In a compound, elements are combined in a fixed ratio.
2. Retention of Properties: The components of air (like oxygen and nitrogen) retain their individual properties. For example, oxygen in the air still supports combustion, and nitrogen still acts as a diluent. In a compound, the properties of the constituent elements are lost, and the compound has entirely new properties.
Suggested Q&A
Biology · Class 9- BiologyClass 9A boy runs along a circular track of radius 7 meters. If he completes one full round in 22 seconds, calculate his average speed and the magnitude of his average velocity for this round.
- BiologyClass 9What is the function of stomata in the epidermis of plant leaves?
- BiologyClass 9Describe the general characteristics of connective tissues that set them apart from other animal tissues.
- BiologyClass 9Distinguish between primary growth and secondary growth in plants, indicating which meristems are responsible for each.
- BiologyClass 9What is the role of intercalated discs in cardiac muscle tissue?
- BiologyClass 9Enlist the major types of cells found in blood and their specific functions.