ICSE Worksheet for chapter-3 Elements , Compounds And Mixtures class 9

Worksheet For class 9

Find ICSE Worksheet for chapter-3 Elements , Compounds  And Mixtures class 9

CLASS-9

BOARD: ICSE

Chemistry Worksheet - 3

TOPIC: ELEMENTS , COMPOUNDS AND MIXTURES

For other ICSE Worksheet for class 9 Science check out main page of Physics Wallah.

ELEMENTS, COMPOUNDS AND MIXTURES

SUMMARY-

• Classification of matter into pure and impure substances.
• Composition of matter.
• Elements – metals, non-metals, metalloids.
• Compounds – (its difference with elements).
• Mixtures – homogenous and heterogeneous.
• Types of solutions – true, colloidal, suspensions.
• Separation of mixtures –

1. Solids –
   1. Solvent extraction.
   2. Fractional crystallization.
   3. Sublimation.
   4. Magnetic separation.
2. Solid and liquid –
   1. Evaporation.
   2. Distillation.
   3. Sedimentation and decantation.
   4. Filtration.
3. Liquids ­–
   1. Separating funnel.
   2. Fractional distillation.
4. Gases –
   1. Diffusion.
   2. Solubility.
   3. Liquefaction.
5. 5) Chromatography.
6. 6) Centrifugation.

SECTION -1

1. Complete the following sentences with appropriate terms such as :
   evaporation, filtration, distillation, fractional distillation, sublimation, methylated spirit, immiscible, separating funnel.
   1. Ammonium chloride is separated from a mixture of sodium chloride and ammonium chloride by process of ____________ .
   2. When sodium hydroxide is added to ferric chloride solution, a reddish brown precipitate is formed. The precipitate is separated from mixture by the process of ____________ .
   3. Benzene and water are ___________ liquids and can be separated by ____________ .
   4. Pure iodine can be obtained by the process of _____________.
   5. Greasy spots can be removed from clothes by _____________.
2. Classify the following into true solution and colloidal solution.
Blood, sugar solution, salt solution, starch, ink.
3. Give examples of the following types of mixtures and state whether they are homogeneous or heterogeneous :
   1. Two solids
   2. A solid in liquid
   3. Liquid (iv) Liquid and gas
4. Give examples of the following types of solutions :
   1. Liquid in water.
   2. Non-aqueous solution.
   3. Solid in non-aqueous solvent.

SECTION -2

1. Give reasons for the following assertions:
   1. Ammonia is a compound.
   2. Air is a mixture, not a compound.
   3. Tap water is a mixture, not a compound.
2. How are solution and suspension different from each other ?
3. The elements can form different compounds. Comment.
4. Briefly describe simple methods of separating the following mixtures :
   1. Nitre and common salt.
   2. Ammonia and hydrogen.
   3. Powdered chalk and sugar.
   4. Sand, table salt, iron filings and naphthalene.
5. Define pure substances and how are these classified ?
6. Explain
   1. What do you understand by chromatography ?
   2. On which principle is it based ?
   3. What is a chromatogram ?
   4. Give two advantages of chromatography.