Read and download free pdf of CBSE Class 9 Chemistry Is Matter Around Us Pure Worksheet Set B. Students and teachers of Class 9 Science can get free printable Worksheets for Class 9 Science Chapter 2 Is Matter Around Us Pure in PDF format prepared as per the latest syllabus and examination pattern in your schools. Class 9 students should practice questions and answers given here for Science in Class 9 which will help them to improve your knowledge of all important chapters and its topics. Students should also download free pdf of Class 9 Science Worksheets prepared by school teachers as per the latest NCERT, CBSE, KVS books and syllabus issued this academic year and solve important problems with solutions on daily basis to get more score in school exams and tests
Worksheet for Class 9 Science Chapter 2 Is Matter Around Us Pure
Class 9 Science students should refer to the following printable worksheet in Pdf for Chapter 2 Is Matter Around Us Pure in Class 9. This test paper with questions and answers for Class 9 will be very useful for exams and help you to score good marks
Class 9 Science Worksheet for Chapter 2 Is Matter Around Us Pure
CBSE Class 9 Chemistry Worksheet - Is Matter Around Us Pure (2)
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Q.1 Two liquids ‘A’ and ‘B’ are miscible with each other at room temperature. Which separation technique will you apply to separate the mixture of ’A’ and ‘B’ if the difference in their boiling point is 27 deg C?
Q.2 Rain water stored in a tank contains sand grains, unfiltrable clay particles, calcium carbonate, salt, pieces of paper and some air bubbles. Select from amongst these one example each of a solvent, a solute, a colloid and a suspension.
Q.3 Suggest separation technique(s) one would need to employ to separate the following mixtures:
(a) Mercury and Water
(b) Potassium Chloride and ammonium chloride
(c) Common salt, water and sand
(d) Kerosene oil, water and salt
Q.4 Give some examples of Tyndall effect observed in your surrounding
Q5: differentiate between:
(a) true solution & a colloid
(b) metals & non-metals
(c) compound & mixtures
(d) physical & chemical changes.
Q.6: 0.5 g of salt is dissolved in 25g of water. Calculate the percentage amount of the salt in the solution.
Q.7: During an experiment the students were asked to prepare a 10% (Mass/Mass) solution of sugar in water. Ramesh dissolved 10g of sugar in 100g of water while Sarika prepared it by dissolving 10g of sugar in water to make 100g of the solution.
(a) Are the two solutions of the same concentration?
(b) Compare the mass% of the two solutions.
Q.8: Explain why filter paper cannot be used to separate colloids?
Q.9: A compound is regarded as a pure substance while the mixture is not. Assign reason.
Q.10: How can a saturated solution be made unsaturated ?
Q.11: Colloidal solutions show Tyndall effect but true solutions do not. Discuss.
Exam Questions NCERT Class 9 Science Chapter 2 Is Matter Around Us Pure
Question. What are two types of matter on the basis of composition?
Ans : Pure substance and mixture.
Question. What is the principle of separation?
Ans : The difference in physical or chemical properties of components of mixture is the basis of separation.
Question. Give chemical name of chalk and quicklime.
Ans : (i) Chalk : Calcium Carbonate
(ii) Quicklime : Calcium Oxide
Question. Milk of Magnesia is a-
Ans : True solution.
Question. Name of process used to separate liquids which have difference in boiling points of less than 25°C—
Ans : Fractional distillation.
Question. Name two metals which are highly malleable and ductile.
Ans : Gold and silver.
Question. Melting of wax is a physical change but burning of wax is a chemical change. Explain.
Ans : (i) Melting of wax changes the state of wax from solid to liquid. No new substance is formed. The chemical nature of solid wax and liquid wax is the same. Hence, melting of wax is a physical change.
(ii) Burning of wax gives new gaseous products. Both the physical and chemical changes are taking place. Hence, burning of wax is a chemical change.
Question. Name the process by which pure copper sulphate can be obtained from its impure sample.
Ans : Crystallization.
Question. Define the term heterogeneous.
Ans : A substance that does not have the same properties throughout the mixture is called heterogeneous.
Question. Define Chromatography.
Ans : The process of separation of different dissolved constituents of a mixture by absorbing them over an appropriate absorber is called, Chromatography.
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CBSE Class 9 Science Chapter 2 Is Matter Around Us Pure Worksheet
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Worksheet for Science CBSE Class 9 Chapter 2 Is Matter Around Us Pure
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Chapter 2 Is Matter Around Us Pure worksheet Science CBSE Class 9
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Chapter 2 Is Matter Around Us Pure CBSE Class 9 Science Worksheet
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Worksheet for CBSE Science Class 9 Chapter 2 Is Matter Around Us Pure
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