Question

CLASS ASSIGNMENT 1
Matter and its Classification, Substances, Mixtures and their characteristics
1. What is meant by a pure substance? Name two pure substances.
2. What is a mixture? Give two examples of mixtures.
3. Does a mixture have a fixed composition?
4. Classify the following as homogeneous mixtures and heterogeneous mixtures.
Sugar solution in water, Air, Soil, Petrol, Chalk and water mixture, Sea water, Biogas, Coal.
5. Mention two properties of heterogeneous mixtures.
6. Mention three characteristics of a mixture.
7. How can the components of a mixture be separated?
8. Name three mixtures found in nature.
9. Which of the following are pure substances?
Iron, Calcium, Wood, Air, Ice, Milk
10. Why is milk considered a mixture?
11. Brass is an alloy which is considered a
12. What is the general name of the material which contain at least two pure substances and show the properties of both the
constituents?
13. Which of the following is not a mixture?
(a) kerosene
(b) petrol
0 (c) air
(d) distilled water
14. On the basis of composition of milk, it is considered to be a
(a) substance
(b) homogeneous mixture (c) heterogeneous mixture (d) compound​

Answer 1

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Answer 2

Answer:

I can't answer this much questions