1) Which of the following is not a pure substance? a) Water  b) Air  c) Diamond  d) Gold 2) Which of the following is a homogeneous mixture? a) Orange juice with pulp  b) Sand and water  c) Saltwater  d) Oil and vinegar 3) The property of a substance to be hammered into thin sheets is called: a) Ductility  b) Malleability  c) Solubility  d) Viscosity 4) An example of a physical change is: a) Rusting of iron  b) Burning of wood  c) Cooking an egg  d) Melting of ice 5) The minimum number of phases that can exist in a heterogeneous system is: a) 1  b) 2  c) 3  d) 4 6) In a true solution, the solute particles are: a) Large and visible  b) Medium-sized and dispersed  c) Very small and evenly distributed  d) Not uniformly mixed 7) Milk of Magnesia is an example of:  a) True Solution  b) Colloidal Solution  c) Suspension  d) None of the above 8) Which of the following is a characteristic property of colloidal solutions? a) They are transparent and do not scatter light.  b) They settle down rapidly on standing.  c) They can pass through ordinary filter paper.  d) They cannot be separated by centrifugation. 9) An element is made up of: a) Two or more types of atoms chemically combined.  b) Two or more elements chemically combined.  c) A single type of atom.  d) A single type of molecule. 10) What is the name of the metal which exists in liquid state at room temperature? a) Sodium  b) Potassium  c) Mercury  d) Bromine

IX_Chemistry_Is Matter Around us Pure?_Quiz_CBSE

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