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Science

Homogeneous and heterogeneous mixtures

In Class 9 Science, this topic introduces homogeneous and heterogeneous mixtures as part of Exploring Mixtures and Their Separation. Students learn how a mixture differs from a pure substance, compare uniform and non-uniform compositions, and identify phases and components in familiar examples such as salt solution, air, soil, and oil mixed with water. They also connect these properties with suitable separation methods and develop clear observation-based ways to classify mixtures.

Medium · Level 1 · 2 questions

TOPIC PRACTICE

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2 questions

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  1. Air is a homogeneous solution of gases; smoke is dispersion of solid particles in gas
  2. Smoke is always purer than air
  3. Air is a gas in solid solution
  4. Smoke contains only liquid particles
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  1. Because a solid solution must also be homogeneous
  2. Because alloy is never a solution
  3. Because solute cannot exist in solid state
  4. Because metals are always gases

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