Question:medium

Identify the solutions among the following mixtures.

Updated On: Jan 19, 2026
  • Soil
  • Sea water
  • Air
  • Coal
  • Soda water
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The Correct Option is B, C,

Solution and Explanation

To identify which of the given mixtures are solutions, we must first understand what constitutes a solution. In chemistry, a solution is a homogeneous mixture composed of two or more substances. In a solution, the solute is evenly distributed within the solvent, resulting in a uniform composition throughout the mixture. Let's examine each option:

  1. Soil: Soil is not a solution. It is a heterogeneous mixture consisting of different particles like minerals, organic matter, air, and water. Since the composition is not uniform, it does not qualify as a solution.
  2. Sea Water: Sea water is a solution. It is a homogeneous mixture where salts (solute) are dissolved in water (solvent). This uniformity across the mixture qualifies it as a solution.
  3. Air: Air is a solution. It is a homogeneous mixture of gases, primarily nitrogen, oxygen, and trace amounts of other gases. The uniform distribution of these gases throughout air makes it a solution.
  4. Coal: Coal is not a solution. It is a heterogeneous mixture consisting of various carbon compounds and impurities. Its composition is not uniform, which disqualifies it from being a solution.
  5. Soda Water: Soda water is a solution. It consists of carbon dioxide gas (solute) dissolved in water (solvent), forming a uniform gaseous-liquid solution.

Based on the above analysis, the solutions among the given mixtures are: Sea water, Air, and Soda water.

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Top Questions on What are the Types of Pure Substances?

Questions Asked in CBSE Class IX exam

(Street Plan) : A city has two main roads which cross each other at the centre of the city. These two roads are along the North-South direction and East-West direction.

All the other streets of the city run parallel to these roads and are 200 m apart. There are 5 streets in each direction. Using 1cm = 200 m, draw a model of the city on your notebook. Represent the roads/streets by single lines. There are many cross- streets in your model. A particular cross-street is made by two streets, one running in the North - South direction and another in the East - West direction. Each cross street is referred to in the following manner : If the 2nd street running in the North - South direction and 5th in the East - West direction meet at some crossing, then we will call this cross-street (2, 5). Using this convention, find: 

(i) how many cross - streets can be referred to as (4, 3). 

(ii) how many cross - streets can be referred to as (3, 4).

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