IS MATTER AROUND US PURE?

IS MATTER AROUND US PURE?

VERY SHORT ANSWER TYPE QUESTIONS (VSAQ)

1. Is soil a pure substance or a mixture? Ans :- Soil is a mixture because it contains different substances like mine...

11. What is a solution? Ans :- A solution is a homogeneous mixture made up of two or more substances that are evenly...

21. Naphthalene and sand can be separated by the process of ________. Ans :- Sublimation. 22. Name the types of mixtu...

31. What is a saturated solution? Ans :- A saturated solution is one where no more solute can dissolve in the solvent...

41. A colloid which has liquid as the dispersed phase and solid as the dispersion medium called Ans :- Gel. 42. Defin...

SHORT ANSWER TYPE QUESTIONS (SAQ)

1. What are the key differences between homogeneous and heterogeneous mixtures? Ans :- Homogeneous mixtures have a un...

2. How can we identify a colloidal solution, and how is it different from a suspension? Ans :- A colloidal solution h...

3. What are the main characteristics of a solution? Ans :- A solution is a homogeneous mixture where the substances a...

4. How do the solute and solvent differ in a solution? Ans :- In a solution, the solvent is the substance that dissol...

5. What are the differences between a dilute solution and a concentrated solution? Ans :- A dilute solution has a sma...

6. What is a saturated solution, and how is it different from an unsaturated solution? Ans :- A saturated solution ha...

7. What are the main properties of a suspension? Ans :- A suspension is a heterogeneous mixture where solid particles...

8. How do colloidal solutions differ from suspensions? Ans :- Colloidal solutions have smaller particles that remain...

9. What distinguishes metals from non-metals? Ans :- Metals are typically shiny, good conductors of heat and electric...

10. What are metalloids, and where do they fit in the classification of elements? Ans :- Metalloids are elements that...

11. How many elements are currently known, and what is their distribution? Ans :- There are over 100 known elements,...

12. What is chromatography? What is its advantage over other methods of separation? Ans :- Chromatography is a method...

13. What is the difference between a mixture and a pure substance? Ans :- A mixture contains two or more substances m...

14. Can we separate a mixture into its components by physical methods? Give an example. Ans :- Yes, mixtures can be s...

15. State the properties of colloidal solution. Ans :- ❑ Properties of a colloidal solution: i. A colloidal s...

17. What is chromatography? What is its advantage over other methods of separation? Ans :- Chromatography is a method...

18. State the properties of a solution. Ans :- The properties of a solution are: i. A solution is a uniform mixture....

19. State the properties of a suspension. Ans :- The properties of a suspension are: i. A suspension is a mixed subs...

20. What is a colloidal solution? Ans :- A colloidal solution is a type of mixture that looks uniform but is actuall...

21. What are colloids? Give their characteristics. Ans :- A colloidal solution is a type of mixture where the particl...

22. Give the applications of centrifugation. Ans :- Application of centrifugation are: i. In Medical Labs: It helps...

23. Give the applications of chromatography. Ans :- Applications of chromatography are: i. Separating Colors: It hel...

24. Why is crystallisation better than evaporation? Ans :- Crystallization is a method used to separate a pure solid...

25. What is the difference in fog and smoke? Ans :- i. Fog is a colloidal solution made up of tiny water droplets mi...

26. How will you separate a mixture of oil and water? Ans :- To separate a mixture of oil and water, use a separatin...

27. Why is air considered as a mixture and not a compound? Ans :- Air is called a mixture because of these reasons:...

28. How can we convert saturated solution into unsaturated by heating? Ans :- i. A saturated solution is one where...

LONG ANSWER TYPE QUESTIONS (LAQ)

1. (a) Define solution. (b) Give different types of solutions with one example each. Ans :- (a) It is a homogeneous...

2. What is a mixture? Explain how mixtures can be separated into their components using physical processes. Give exampl...

3. Explain the methods used to distinguish between different types of mixtures, including homogeneous mixtures, heterog...

4. Explain how solutions can be found in different forms and provide examples of each type. Ans :- Solutions can exi...

5. You are provided with a mixture containing sand, iron filings, ammonium chloride and sodium chloride. Describe the p...

6. Explain the characteristics of a suspension and provide an example. Ans :- A suspension is a heterogeneous mixtur...

7. Describe colloidal solutions and their properties, including the Tyndall effect. Ans :- A colloidal solution is a...

8. What are the key characteristics of metals, non-metals, and metalloids, and how do they differ from one another? A...

10. Classify each of the following, as a physical or a chemical change. Give reasons. (a) Drying of a shirt in the su...

11. Explain the concept of concentration in solutions and describe how it is measured. Ans :- Concentration in solut...

12. (a) Under which category of mixtures will you classify alloys and why? Ans :- A mixture is when two or more ele...

13. How can you prove that water is a compound? Ans :- Water is a compound because when we pass electricity through...

NCERT SOLUTION

Page No. 151. What is meant by a substance? Ans :- A substance is a type of matter that has a uniform and definite comp...

List the points of differences between homogeneous and heterogeneous mixtures. Ans:-...

Page No. 18Differentiate between homogenous and heterogeneous mixtures with examples. Ans:- The following are the...

How are sol, solution and suspension different from each other? Ans:- Featur...

To make a saturated solution, 36g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration...

Page No. 19 Classify the following as chemical or physical changes: i. cutting of trees, ii...

Try segregating the things around you as pure substances or mixtures. Ans:- Listed below are the classific...

Exercises 1.Which separation techniques will you apply for the separation of the following?...

Page No. 23 2. Write the steps you would use for making tea. Use the words solution, solvent...

3. Pragya tested the solubility of three different substances at different temperatures and collected the data as giv...

4. Explain the following, giving examples. (a) Saturated solution (b) Pure substance (c) Colloid (d) Suspension...

5. Classify each of the following as a homogeneous or heterogeneous mixture. soda water, wood, air, soil, vinegar, fi...

6. How would you confirm that a colourless liquid given to you is pure water? Ans :- To confirm if a colo...

Page No. 24 7. Which of the following materials fall in the category of a “pure substa...

10. Classify the following into elements, compounds and mixtures. (a) Sodium (b) Soil (c) Sugar solution (d) Si...

11. Which of the following are chemical changes? (a) Growth of a plant (b) Rusting of iron (c) Mixing of iron filing...

SUMMARY

Introduction When we buy things like milk, ghee, butter, salt, or juice from the store, we often see the word "pure"...

What Is a Mixture? A mixture is made up of two or more pure substances. For example, sea water, soft drinks, and soil...

Types of Mixtures ❑ Homogeneous Mixtures: ❑ Definition: These mixtures have a uniform composition throughout,...

What is a Solution? A solution is a homogeneous mixture made up of two or more substances. This means that in a solution...

What are Alloys? Alloys are mixtures made from two or more metals, or a metal combined with a non-metal. Unlike other mi...

Concentration of a Solution ❑ Understanding Concentration: Concentration refers to the amount of solute (the substa...

What is a Suspension? A suspension is a type of mixture where solid particles are mixed with a liquid but do not dissolv...

What is a Colloidal Solution? A colloidal solution is a type of mixture where tiny particles are evenly spread througho...

Physical and Chemical Changes ❑ Physical Changes: These are changes that do not alter the chemical composition of a...

Types of Pure Substances Pure substances can be classified into two main categories based on their chemical composition...

Compounds A compound is a special type of substance formed when two or more different elements combine chemically. Unli...

Summary of Key Concepts ❑ Mixtures: A mixture consists of two or more substances (which can be elements or compound...