In text questions page number 15 Chapter 2: is Matter Around Us Pure Science Class 9 solutions are avalable at ourwebsite to help the students. In text questions page number 15 is solved by our expert teachers. You can get ncert solutions and notes for class 9 chapter 2 absolutely free. NCERT Solutions for class 9 Science Chapter 2: is Matter Around Us Pure will definitely help in improving your marks in CBSE Board examinations.
In text questions page number 15
1. What is meant by a pure substance?
Answer: A pure substance consists of single type of particles that is all the constituent particles of a pure substance have same chemical nature. For example all elements and compounds (Na, NaCl etc) are substance.
2. List the points of differences between homogeneous and heterogeneous mixtures.
Answer:
| Homogeneous Mixtures | Heterogeneous Mixtures |
| 1. Homogeneous mixtures have uniform composition. | 1. Heterogeneous mixtures have non uniform composition |
| 2. It has no visible boundaries of separation between its constituents. | 2. It has visible boundaries of separation between its constituents. |
| 3. Some examples of homogeneous mixtures are: salt in water, sugar in water. | 3. Some examples of heterogeneous mixtures are: water and sand, oil and water. |
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