Is matter around us pure
Important questions of is matter around us pure
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?
Assignment 2
1. What is meant by solute, solvent and solution?
2. Are the solutions homogeneous or heterogeneous?
3. What is meant by an unsaturated solution?
4. What are (a) aqueous solution (b) nonaqueous solution?
Give one example of each.
5. Why is water called universal solvent?
6. What are the advantages of preparing/using solutions?
7. How much water should be added to 15 g of sugar to prepare a 15% sugar solution?
8. How is the concentration of any solution expressed in terms of mass-by-volume percentage?
9. A student dissolves 32 g of potassium nitrate in water to prepare 200 mL of the solution.
What is the concentration of solution in terms of mass-by-volume?
10. What is a saturated solution? How to prepare a saturated solution of a given solute?
11. What happens when the temperature of a saturated sugar solution is increased?
12. What is the effect of change in temperature on the solubility of a solid salt in water?
13. 5 mL of acetone is mixed with water to make a volume of 50 mL. What is the concentration of acetone in solution?
Important questions of is matter around us pure
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?
Assignment 2
1. What is meant by solute, solvent and solution?
2. Are the solutions homogeneous or heterogeneous?
3. What is meant by an unsaturated solution?
4. What are (a) aqueous solution (b) nonaqueous solution?
Give one example of each.
5. Why is water called universal solvent?
6. What are the advantages of preparing/using solutions?
7. How much water should be added to 15 g of sugar to prepare a 15% sugar solution?
8. How is the concentration of any solution expressed in terms of mass-by-volume percentage?
9. A student dissolves 32 g of potassium nitrate in water to prepare 200 mL of the solution.
What is the concentration of solution in terms of mass-by-volume?
10. What is a saturated solution? How to prepare a saturated solution of a given solute?
11. What happens when the temperature of a saturated sugar solution is increased?
12. What is the effect of change in temperature on the solubility of a solid salt in water?
13. 5 mL of acetone is mixed with water to make a volume of 50 mL. What is the concentration of acetone in solution?
