Answer: Here we are providing Extra Questions for Class 9 Maths Chapter 1 Number System.also you can get answers of these questions. Explain. (b) Sublimation Very Short Answer Type Questions [1 Mark] Question 1. [NCERT Exemplar] (e) Settling of sand when a mixture of sand and water is left undisturbed for some time. Question 11. Number System Important Questions For Class 9 (Chapter 1) Below given important Number system questions for 9th class students will help them to get acquainted with a wide variation of questions and thus, develop problem-solving skills. How can you change a saturated solution to an unsaturated solution without adding any more solvent to it? How much water should be mixed with 12 mL of alcohol so as to obtain 12% alcohol solution? Melting of iron metal, bending of iron rod and drawing a wire of iron metal are physical changes because there is no change in the chemical composition of iron, only its form is changing. [NCERT Exemplar] What is people as a resource? (i) would not leave residue on filter paper after filtration? [ NCERT Exemplar] Answer: Dilute hydrochloric acid was added to both the parts and evolution of gas was seen in both the cases. Answer: 2. (a) a saturated solution of potassium chloride prepared at 60°C is allowed to cool at room temperature? Answer: By heating the saturated solution, it becomes unsaturated. Very Short Answer Type Questions [1 Mark] Question 1. (i). A compound can be split into new substances by chemical methods. The first part of the consists of chapter 1: Number system, chapter 2: Polynomials, chapter 3: Coordinate geometry, chapter 4: Linear equation in two variables, chapter 5: introduction to Euclid’s geometry, chapter 6: lines and angles, chapter 7: triangles and chapter … (e) Name a non-metal other than carbon which shows allotropy. Question 11. This process is used to obtain wines from the sugarcane juice. 12 + x = 100 Answer: Question 13. Mention one example of hard and soft rock with their use. Answer: Give reasons. Question 2. (b) an aqueous sugar solution is heated to dryness? We hope the given NCERT MCQ Questions for Class 9 Geography Chapter 2 Physical Features of India with Answers Pdf free download will help you. Question 6. (ii) Mixtures of chalk powder with water and milk with water. This is because the colloidal particles are big enough to scatter light falling on them. Register online for Science tuition on Vedantu.com to score more marks in your examination. [NCERT Exemplar] What would you observe when Answer: (i) Sulphur powder Total mass of the solution = (30 + 20 + 500)g CaO + H2O → Ca(OH)2 (basic solution) Extra Questions for Class 9 English Beehive, Moments, Literature Reader Important Questions Question 3. (b) It is a physical change because water in the radiator is converted from a liquid state to gaseous state. They were amazed to see that milk taken in the tumbler was illuminated. We already provided class 9 science NCERT solutions.CBSE Classs 9 Science Extra questions are very helpful to score more marks, … Volume of alcohol present in solution = 5.6 mL (g) Carbon ‘C’ has made the desired solution because 50% (mass by volume) solution means 50g of solute dissolved in 100 mL of solution. (d) Separation by using separating funnel to separate kerosene oil followed by evaporation or distillation. Identify the elements from the following substances: sulphur, brine, hydrochloric acid, water, neon, paper, sugar. Solution: What do you understand by the term distillation? Distillation is used to get back acetone. Question 6. If a beam of light is put on a salt solution kept in a beaker in a dark room, the path of light beam is not visible inside the solution when seen from the other side. Question 1. Ans: There are a total of 15 chapters in CBSE Class 9 maths solutions book. (b) Bromine Suggest separation technique (s) one would need to employ to separate the following mixtures: Solvent – water Solute – salt Concentration of solution = $$\frac{\text { Volume of solute }}{\text { Volume of solution }} \times 100$$ Mass of salt present in the solution = 20 g Answer: Particle size in a suspension is larger than those in a colloidal solution. [NCERT Exemplar] Colloid – air bubbles Suspension – clay particles. [NCERT Exemplar] The less soluble colour components dissolve a little later, rise slower and form coloured bands at lower heights. Answer: Mass of solution = 120 g, Question 3. H2S gas formed has a foul smell and on passing through lead acetate solution, it turns the solution black. Check other important resources for exam preparation. An element cannot be split by physical or chemical methods. Describe any three properties of colloid. Non-metals – Diamond, iodine and helium Question 7. Extra Questions for Class 9th: Ch 2 Is Matter Around us Pure (Science) Important Questions Answer Included Very Short Answer Questions (VSAQs): 1 Mark Q.1 How can you change a saturated solution to an unsaturated solution without adding any more solvent to it? True solutions are vinegar and glucose solution. Question 3. On heating, calcium carbonate gets converted into calcium oxide and carbon dioxide. = $$\frac{50}{100} \times 100$$ = 50% mass by volume. (a) Under which category of mixtures will you classify alloys and why? (d) It is a chemical change because there is a reaction between the citric acid in the lemon and the compounds of tea resulting in formation of new products. Fractional distillation is suitable for separation of miscible liquids with a boiling point difference of about 25 K or less. Fe(s) + S(s) + 2HCl(aq) → FeCl2(aq) + H2(g) (b) Compare the mass % of the two solutions. (b) Dissolution/diffusion (c) Metallic sodium is soft enough to be cut with a knife. Answer: People as a resource means people are an asset rather than a liability, i.e., the work population of a country. Question 1. (a) Fog—liquid, gas Sodium chloride will dissolve in water and sand is left as residue on the filter paper. Which of the following are physical changes? Sucrose (sugar) crystals obtained from sugarcane and beetroot are mixed together. Iodine is the solute and alcohol is the solvent. Answer: x = 100 – 12 = 88mL 1. (d) Iron sulphide ∴ Mass of glucose = $$\frac{40 \times 250}{100}$$ = 100g As per the new syllabus students will study English Language and Literature in class 9 th and 10 th.The following page is dedicated to moments solutions. Question 8. The scattering of light by colloidal particles is known as Tyndall effect. Answer: In this page you can find NCERT Extra Questions for Class 9 English Beehive, Moments, English Literature Reader. (a) Chlorine gas (c) An acetone bottle is left open and the bottle becomes empty. Solution: (c) Can you suggest two more solutions which would show the same effect as shown by the milk solution? Therefore, sea water is considered homogeneous. Mass of water present in solution = 25 g (a) The composition of a sample of steel is 98% iron, 1.5% carbon and 0.5% other elements. Answer: (a) glucose, It is a pure substance because chemical composition of sugar crystals is same irrespective of its source. Question 15. Construct a right triangle whose base is 12cm and sum of … On evaporation, these contaminate the solid. Student must start solving the important question once they are completed with the CBSE Class 9 Science syllabus at least 2 months before the annual exam. Answer: Colloids are fog, aluminium paint. (iii) Diamond (v) Glass [Answer: 7/6, 8/6, 9/6, 10/6, 11/6] Q.2: Find … Whose mixture: (e) Aluminium Important questions for Class 9 Maths Chapter 2 named Polynomials help the students to prepare for the Class 9 Mathematics Examination. In what way are they different? Gallium and mercury exist in liquid state at room temperature. (a) Are the two solutions of the same concentration? (b) No, solid solutions and gaseous solutions are also possible. Name the allotrope. You are given two samples of water labelled as ‘A’ and ‘B’. Metalloids – Germanium, boron. When dilute HCl is added to it Atoms and Molecules Class 9 Extra Questions Very Short Answer Questions. Answer: Explain why particles of a colloidal solution do not settle down when left undisturbed, while in the case of a suspension they do. Answer: Students can get Class 9 English NCERT Solutions, Chapter Wise CBSE Class 9 English Important Questions and Answers were designed by subject expert teachers. Answer: Question 3. Answer: 5 Questions. Differentiate between a true solution and a colloid. CBSE Shemushi Sanskrit Class 9- Chapter 2- स्वर्णकाकः NCERT Exercise Solution ( Question-Answer) is provided below. Answer: (a) Alloys are homogeneous mixture of two or more elements because the constituent elements mix together and give a mixture which is uniform throughout. (c) No, a solution cannot be heterogeneous in nature. Question 8. Volume of solution = (12 + x) mL Your email address will not be published. Which sample of water will not freeze at 0°C? Question 1. Based on which factor a solution is said to be diluted, concentrated or saturated? Answer: Answer: Explain using a diagram. Mass of glucose present in the solution = 30 g (a) It is a physical change because water is converted from its liquid state to gaseous state because of the sun’s heat. Answer: Question 9. Sample ‘A’ boils at 100°C and sample ‘B’ boils at 102°C. [NCERT Exemplar] What is […] (a) Sublimation Give reason in support of your statement NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12, Extra Questions for Class 9 Science Chapter 2 Is Matter Around Us Pure. (i) Pure sand Answer: Chromatography is a technique used for the separation of a mixture of solutes brought about by distribution of dissolved material between two immiscible phases, one of which is mobile phase and the other part is stationary phase. For example, oxygen, carbon etc. Question 3. Science Class 9 Important Questions are very helpful to score high marks in board exams.Here we have covered Important Questions on all topics for Class 9 Science subject. Give reasons for the same. Solution: Question 1. (b) Initially the water will evaporate and then sugar will get charred. Melting of iron metal, rusting of iron, bending of iron rod, drawing a wire of iron metal. Weathering the Storm in Ersama Extra Questions and Answers Class 9 English Moments August 10, 2020 by Laxmi In this page you can find Weathering the Storm in Ersama Extra Questions and Answers Class 9 English Moments, Extra Questions for Class 9 English will make your practice complete. (a) Mercury and water Answer: What part of fractional distillation apparatus makes it efficient and possess an advantage over a simple distillation process? Question 5. Non-metals are usually poor conductors of heat and electricity. (a) Milk is a colloid. Why Democracy? Why is crystallisation technique considered better than simple evaporation to purify solids? What are the two components of a colloidal solution? (b) Salt solution is a true solution. This scattered light enters our eyes and we are able to see the path of light beam. If the work done by a body on application of a constant force is directly proportional to the distance travelled by the body, express this in the form of an equation in two variables and draw the graph of the same by taking the constant force as 5 units. It is useful in forensic science to detect and identify trace amounts of substances in the contents of bladder or stomach. (c) Evaporation/diffusion Identify colloids and true solutions from the following: Question 2. (c) Filtration to separate sand followed by evaporation/distillation Answer: Question 7. (b) Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas. Close the stopcock of the separating funnel as the oil reaches the stopcock. So, Class … (f) Iodine Answer: Antoine L. Lavoiser and Joseph L. Proust. Show diagrammatically how water is purified in the waterworks system and list the processes involved. (d) Carbon Question 7. NCERT Extra Questions for Class 9 Social Science History : India and the Contemporary World – I, Geography : Contemporary India – I, Civics (Political Science) : Democratic Politics – I, Economics : Understanding Economic Development – I Pdf free download are part of NCERT Solutions for Class 9 Social Science.Here we have given CBSE Class 9 … [NCERT Exemplar] Justify your choice. Also, length of the column would increase the efficiency of separation. Solution: Mass of urea present in solution = 16 g Is water an element or a compound? Distinguish between physical change and chemical change. Explain why filter paper cannot be used to separate colloids. Answer: Volume of water = 75 mL Answer: NCERT Class 9 Civics Chapter 2 Extra Questions and Answers What is Democracy? Why is it not possible to distinguish particles of a solute from the solvent in solution? Distinguish between compounds and mixtures. Answer By heating the saturated solution, it becomes … Find out the mass percentage of the solution. Science Important Questions Class 9 are given below chapter … Question 2. So, Mass of water = Mass of solution – Mass of glucose Answer: Answer: Let the mass of sodium sulphate required be x g. = 250g – 100g = 150g. [NCERT Exemplar] Name the process associated with the following: Question 10. Question 2. Question 10. Solution: $$\mathrm{Fe}(s)+\mathrm{S}(s) \quad \stackrel{\mathrm{Heat}}{\longrightarrow} \quad \mathrm{FeS}(s)$$ Important questions in Polynomials with video lesson. Here is the complete solution of 9th class … Also read from the graph the work done when the distance travelled by the body is: 2 … Part B Question 10. (v) Mixture of chalk powder and water. The solution prepared by Sarika has a higher mass per cent than that prepared by Ramesh. A solution of urea in water contains 16 grams of it in 120 grams of solution. The two components of a colloidal solution are dispersed phase and dispersing medium. In this way, three different bands will be observed. (d) Kerosene oil, water and salt. A solution has been prepared by mixing 5.6 mL of alcohol with 75 mL of water. It gives you a clear moments meaning as English in class 9 is known as moments English class 9. Iron filings will get attach to the magnet and thus separate from the mixture. It is defined as the mass in grams of the solute present in one hundred grams of a solution. (e) Sedimentation If a beam of light is put on a milk sample contained in a beaker, the path of light beam is illuminated and becomes visible when seen from the other side. Mass of solution = Mass of glucose + Mass of water Total 7 Questions are in this latest NCERT Exercise (अभ्यास:) of Chapter 2- स्वर्णकाकः, all … CBSE Class 9 Science Extra Questions with Answers - Download important questions for Class 9 Science Exam 2020-21. If so, write the chemical equation involved. (a) No. If not, explain. 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Calculate the mass of water and glucose required to make 250 g of 40% solution of glucose. Important questions for Class 9 Maths Chapter 2 Polynomials are provided here to help the CBSE students score well in their Class 9 Maths exam. (ii) Name the technique used by the child. Question 9. Filter the solution. Chapter 12 Heron’s Formula Class 9 Extra Questions; Chapter 13 Surface Areas and Volumes Class 9 Extra Questions; Chapter 14 Statistics Class 9 Extra Questions; Chapter 15 Probability Class 9 Extra Questions; NCERT Solutions for Class 9 Maths. Pour the mixture of kerosene oil and water in separating funnel as shown in figure. ∴ Percentage amount of the salt = $$\frac{0.5}{0.5+25} \times 100$$ = 1.96%, Question 2. Question 2… Answer: Question 3. (a) Explain why the milk sample was illuminated. [NCERT Exemplar] Answer: They scatter light passing through them making its path visible. Part ‘A’ was heated strongly while Part ‘S’ was not heated. 1.1 Class 9 Science Important Questions-Atom; 1.2 Class 9 Science Important Questions-Diversity in living Organisms; 1.3 Class 9 Science Important Questions-Food resources; 1.4 Class 9 Science Important Questions-Force and Laws; 1.5 Class 9 Science Important Questions … They can be separated by fractional distillation. [NCERTExemplar] Extra Questions To Practice For Class 9 Maths Chapter 11 (CBSE) Construct a triangle PQR in which QR = 6cm, ∠Q = 60° and PR – PQ = 2cm. (a) Iodine CBSE Class 9 History Chapter 2 Extra Questions Socialism in Europe and the Russian Revolution Pdf free download are part of Extra Questions for Class 9 Social Science.Here we have given NCERT Extra Questions for Class 9 Social Science SST History Chapter 2 Socialism in Europe and the Russian Revolution. Give two points of differences between an element and a compound. Extra questions for CBSE class 9 maths chapter 2 with solution. Describe an activity with diagram to separate a mixture of water and kerosene oil. The size of colloidal particles is less than lnm, while the size of pores present in an ordinary filter paper is larger than lnm. (b) Cheese—liquid, solid The mass of solution would be = (x + 100)g Question 5. This is because salt particles present in it are so small that they cannot scatter light rays falling on them. The physical and chemical properties of hydrogen and oxygen are entirely different from the properties of water. Describe the procedures you would use to separate these constituents from the mixture. Removing sand by filtration Make a solution of sand and sodium chloride in water. The filter paper was removed when the water moved near the top of the filter paper. (f) Fine beam of light entering through a small hole in a dark room, illuminates the particles in its paths. Chlorine gas, iron, aluminium, iodine, carbon, sulphur powder. 4 Comments. [NCERT Exemplar] Question 8. Sample ‘B’ will not freeze at 0°C because it is not pure water. Answer: Examples are brass, air. (c) Common salt, water and sand Is Matter Around Us Pure Class 9 Extra Questions Science Chapter 2. While diluting a solution of salt in water, a student by mistake added acetone (boiling point 56°C). Solution: An unknown substance ‘A’ on thermal decomposition produces ‘B’ and ‘C’. Solution: (v) could be filtered by filter paper? Question 1. [NCERT Exemplar] Log in, Concise Mathematics Class 10 ICSE Solutions 2018, Click to share on WhatsApp (Opens in new window), Click to share on Telegram (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on Tumblr (Opens in new window), Click to share on Pinterest (Opens in new window). Question 6. Answer: (b) Same results were not observed with a salt solution. Pond water, fog, aluminium paint, vinegar and glucose solution. (ii) would show Tyndall effect? Question 5. Fe(i) + S(s) → Mixture of iron filings and sulphur Question 1. (f) Name a non-metal which is required for combustion. (b) salt (density of water = 1 g /mL). CBSE Class 9 English Extra Questions And Notes- Moments. Answer: Question 13. These extra questions are entirely based on the NCERT textbook. (a) Chemical change. Rain water stored in a tank contains sand grains, unfiltrable clay particles, calcium carbonate, salt, pieces of paper and some air bubbles. Distillation is a process of boiling a liquid and then condensing the vapour obtained into a liquid. Answer: Answer: So, 88 mL of water should be mixed. Classify the following into metals, non-metals and metalloids: Also molecular interaction in a suspension is not strong enough to keep the particles suspended and hence they settle down. (e) It is a physical change because the cream suspended in the milk is separated by churning. ‘Sea water can be classified as homogeneous as well as heterogeneous mixture.’ Comment. Give its one application. Question 12. (d) Most metal oxides form alkalis on interacting with water. (i) Germanium Name the phenomenon involved. Answer: He marked a line by the ink on the filter paper and placed the filter paper in a glass containing water as shown in figure. Iron filings and sulphur were mixed together and divided into two parts ‘A’ and ‘S’. (f) Scattering of light (Tyndall effect). Why is water called universal solvent? Question 4. Let the volume of water = x mL The elements are sulphur and neon. Polynomials in one variable, zeroes of polynomial, Remainder Theorem, Factorization, and Algebraic Identities. State the principle of separating two immiscible liquids by separating funnel. A compound is obtained from different kinds of atoms. Identify the dispersed phase and dispersing medium in the following colloids. (iii) Suggest one more application of this technique. (b) Name a non-metal which exists as a liquid at room temperature. (a) Is this a physical or a chemical change? (iv) Mixture of chalk powder and water. How will you identify the gases evolved? Question 9. Calculate the mass per cent of $$12=\frac{12}{12+x} \times 100$$ Two liquids ‘A’ and ‘B’ are miscible with each other at room temperature. (ii) Chromatography (vi) CaO. Question 1. Extra Questions For Class 9 Maths Chapter 4. By heating the saturated solution, it becomes unsaturated. (iii) Ammonia gas Smoke and fog both are aerosols. Free PDF download of Important Questions with solutions for CBSE Class 9 Science Chapter 6 - Tissues prepared by expert Science teachers from latest edition of CBSE(NCERT) books. Name two scientists who established the laws of chemical combination? Answer: Question 1. So, the mixture of liquids ‘A’ and ‘B’ can be separated by fractional distillation. They fixed a source of light (a torch) at one end of the box by making a hole in it and made another hole on the other side to view the light. Class 9 Maths Chapter 11 important questions with solutions are available for students to prepare for exam 2020. (c) Detergent solution, sulphur solution. Classify the following as physical or chemical properties: Distinguish between metals and non-metals. Question 10. Here we have provided the chapter wise CBSE important questions for Class 9 Science. (d) Milk is churned to separate cream from it. Calculate the percentage (by volume) of alcohol in the solution. Sea water is a mixture of salts and water which cannot be separated except by evaporation. Activity to separate kerosene oil from water using a separating funnel: Question 4. At 1 atm, the boiling point of pure water is 100°C and the freezing point of pure water is 0°C. Extra Questions for Class 9 Social Science Geography Chapter 2 Physical Features of India. (a) Name a lustrous non-metal. Which of the following are not compounds? SOLVED QUESTION BANK. (b) Acidic and basic solutions can be prepared by dissolving the products of the above process in water. SOLVED QUESTION BANK. [NCERT Exemplar] Answer: Register online for Science tuition on Vedantu.com to score more marks in your examination. The teacher instructed three students A’, ‘B’ and ‘C’ respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). Calculate the mass of sodium sulphate required to prepare its 20% (mass per cent) solution in 100 g of water. (b) Potassium chloride ECONOMICS. (iv) Iodine 1 Class 9 Science – Chapter wise Important Questions. Answer: How does Abraham Lincoln define democracy? Chapter 1- What is Democracy? [NCERT Exemplar] Question 12. It is composed of two different elements, hydrogen and oxygen which cannot be separated by physical methods. (c) Can a solution be heterogeneous? What is mass per cent of a solution? Practice with these important questions to … Numericals Comment. (iii) Mixture of common salt and water. Select from amongst these one example each of a solvent, a solute, a colloid and a suspension. [NCERT Exemplar] (v) Copper Answer: CBSE Class 9 Maths Chapter 6 Lines and Angles Extra Questions for 2020-21.
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