CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set E

Read and download free pdf of CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set E. Download printable Science Class 9 Worksheets in pdf format, CBSE Class 9 Science Chapter 2 Is Matter Around Us Pure Worksheet has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Science Class 9 Assignments and practice them daily to get better marks in tests and exams for Class 9. Free chapter wise worksheets with answers have been designed by Class 9 teachers as per latest examination pattern

Chapter 2 Is Matter Around Us Pure Science Worksheet for Class 9

Class 9 Science students should refer to the following printable worksheet in Pdf in Class 9. This test paper with questions and solutions for Class 9 Science will be very useful for tests and exams and help you to score better marks

Class 9 Science Chapter 2 Is Matter Around Us Pure Worksheet Pdf

 
IS MATTER AROUND US PURE?
 
1. 1 Mark questions
 
i. How can we separate a mixture of two miscible liquids?
 
ii. What separation technique will you apply for separation of the following?
 
a) Ammonium chloride from sodium chloride.
 
b) Different pigments from flower extracts.
 
iii. How do we test the purity of substances?
 
iv. Name the process by which we separate the particles of a colloid.
 
v. What is meant by fractionating column?
 
vi. What are metalloids?
 
vii. Suggest one method toincrease the solubility of a saturated solution.
 
viii. Why dry ice does not wet the surface on which it is kept?
 
2. 2 Mark questions
 
i. State two reasons to justify that air is a mixture and water is compound.
 
ii. Distinguish between homogeneous and heterogeneous mixture.
 
iii. Classify the following mixtures as homogeneous and heterogeneous.mTincture of iodine , Sugar solution, Smoke , Brass
 
iv. A solution of acetone contains 30 ml of acetone in 570 ml of water. Calculate the mass percentage concentration of the solution.
 
v. The concentration of a salt solution in terms of mass by mass percentage is 20 and the massof the solution is 550 g. Find the mass of salt.
 
vi. Identify the physical and chemical changes from the following
 
a. Burning of magnesium in air
 
b. Electrolysis of water
 
c. Tarnishing of silver spoon
 
d. Sublimation of iodine
 
vii. Fine beam of light entering through a small hole in a dark room, illuminates the particles inits path. Name the process associated and explain.
 
viii. Distinguish among soda water, milk and muddy water in a tabular form under the following heads :
 
a. Stability
 
b. Filterability
 
c. Type of mixture
 
d. Tyndall effect
 
ix. 110 g of salt is present in 550g of solution. Find themass % of the solution.
 
x. 10 ml of Sulphuric acid is dissolved in 90 ml of H2O. Calculate the concentration of solution.
 
xi. State the condition for using the method of centrifugation to separate contents of a mixture. Also write the principle involved in the process.
 
xii. Enumerate any two differences between simple distillation and fractional Distillation.
 
xiii. Few iron filings and a pinch of Sulphur powder are taken in a china dish and mixed properly.Justify the change,giving 2 points as physical/chemical change.
 
xiv. Name the solute and solvent present in aerated drinks?
 
xv. Given a solution of a substance ‘A’, how will you test whether it is saturated or unsaturated with respect to ‘A’ at the given temperature?
 
3. 3 Mark questions
 
i. Draw a neat labeled diagram of the apparatus used for separating acetone and water (forming a miscible mixture) from their mixture.
 
ii. Two miscible liquids A and B are present in a solution. The boiling point of A is 60°C while that of B is 98°C. Suggest a method to separate the components of mixture. Why are they separated by this process?
 
iii. Which technique, crystallization or evaporation is better to obtain sugar from its solution in water?
 
iv. Name the technique used for separation of those solutes that dissolve in the same solvent andgive any two applications of this technique.
 
v. What separation technique will you apply for the separation of the following?
 
a. Sodium chloride from its solution
 
b. Tea leaves from tea
 
c. Different pigments from an extract of leaves
 
d. Butter from curd
 
e. Fine mud particles suspended in water
 
f. Iron pins from sand
 
vi. Describe the method used for separating the components of blood. List its any two applications.
 
vii. Write any three differences between a compound and a mixture.
 
viii. Classify the following into physical change or chemical change :
 
a) Burning of a candle
 
b) Fading of clothes
 
c) Tarnishing of silver spoon
 
d) Mixing of iron filings and sand
 
e) Sublimation of iodine
 
f) Electrolysis of water
 
ix. Distinguish between elements and compounds with one example of each. Elements are classified as metals, non-metals and metalloids. Give any one property of each. Also give one example of each.
 
x. State the principle involved in the following separating techniques.
 
a) Chromatography b) Distillation c) Evaporation
 
xi. Define the following terms :
 
a. Pure substance b.Mixture c.Solution d.Alloys
 
e. Saturated Solution f. Unsaturated Solution
 
g. Solubility h. Distillation i. Element
 
j. Compound
 
4. Multiple Choice Questions:
 
(1) Which of the following is the most stable?
 
(a) True Solution (b) ColloidalSolution (c) Suspension (d) Milk
 
(2) 40g of common salt is dissolved in 320g of water. The mass percentage of the salt is :
 
(a) 11.1% (b) 12.5% (c) 15% (d) 10%
 
(3) Mixture of Blue ink and Red ink can be separated by
 
(a)Evaporation (b) separating funnel (c) Chromatography (d) Distillation
 
(4) Particles of colloidal solution can be separated by :
 
(a) Distillation (b) Filtration (c) Centrifugation (d) Evaporation
 
(5)Alloys are:
 
(a)Pure substances (b) Homogeneous mixtures (c) Compounds (d) of fixed composition
 
5. Fill in the Blanks:
 
1. -------------- is a non-metal which is sublimable and lustrous.
 
2. The size of particles of true solutions is -----------
 
3. Rusting of Iron is a -------------change.
 
4. The Boiling point of Nitrogen is-------------
 
5. Assertion- Reason Questions:
 
Read the statements carefully and choose the correct alternative from the following:
 
(a) Both the Assertion and the Reason are correct but the Reason is the correct explanation of the Assertion.
 
(b) The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.
 
(c) Assertion is true but the Reason is false.
 
(d) The statement of the Assertion is false but the Reason is true.
 
Assertion: A saturated solution becomes super saturated on cooling.
 
Reason : It is because solubility decreases with decrease in temperature.



Please click on below link to download CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set E

CBSE Class 9 Science Chapter 2 Is Matter Around Us Pure Worksheet

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