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ICSE Class X Board Exam 2023 : Geography

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St. Andrews Scots Sr. Sec. School 9th Avenue, I.P. Extension, Patparganj, Delhi 110092 Session: 2022-2023 - Worksheet 06 Class: VI Subject: Science Topic: Separation of Substances Q.1 Define: a) b) c) d) e) Mixture Molecule Element Pure Substance Distillation Q.2 Fill in the blanks a) b) c) d) e) Small pieces of stone can be removed from rice by ___________. Husk from wheat flour is generally removed by ________. _________ are obtained from stalks by threshing. The process of setting of heavier particles is called ________. Filtration is helpful in separating an insoluble _________ from a ________. Q.3 Very Short Question Answers: a) b) c) d) e) Give one example of sieving used in everyday life. When is handpicking used? Which substance is used for loading? Which types of mixtures are separated by evaporation? What is decantation? Q.4 Multiple choice questions: a) Riya bought some vegetables such as French beans, lady s finger, green chillies, brinjals and potatoes all mixed in a bag. Which of the following methods of separation would be most appropriate for her to separate them? (a) Winnowing (b) Sieving (c) Threshing (d) Hand picking b) Akshay s grandmother is suffering from diabetes. Her doctor advised her to take Lassi with less fat content. Which of the following methods would be most appropriate for Akshay to prepare it? (a) Filtration (b) Decantation (c) Churning (d) Winnowing c) Which of the following mixtures would you be able to separate using the method of filtration? (a) Oil in water (b) Cornflakes in milk (c) Salt in water (d) Sugar in milk d) Which amongst the following methods would be most appropriate to separate grains from bundles of stalks? (a) Hand picking (b) Winnowing (c) Sieving (d) Threshing e) In an activity, a teacher dissolved a small amount of solid copper sulphate in a tumbler half filled with water. Which method would you use to get back solid copper sulphate from the solution? (a) Decantation (b) Evaporation (c) Sedimentation (d) Condensation Q.5 Answer the following questions: a) You are provided with a mixture of salt, sand, oil and water. Write the steps involved for the separation of salt, sand and oil from the mixture by giving an activity along with the diagram. b) Name and describe briefly a method which can be helpful in separating a mixture of husk from grains. What is the principle of this method?

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