Quiz: Is Matter Around US Pure?

15 Questions | Total Attempts: 17671

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Quiz: Is Matter Around US Pure?

Time: 30 Minute


Questions and Answers
  • 1. 
    Which of the following statements are true for pure substances?
    1. Pure substance contain only one kind of particles
    2. Pure substance may be compounds or mixtures
    3. Pure substance have the same composition throughout
    4. Pure substances can be exemplified by all elements other than nickel
    • A. 

      A) and b)

    • B. 

      A) and c)

    • C. 

      C) and d)

    • D. 

      B) and c)

  • 2. 
    Rusting of an article made up of iron is called 
    • A. 

      Corrosion and it is a physical as well as chemical change

    • B. 

      Dissolution and it is a physical change

    • C. 

      Corrosion and it is a chemical change

    • D. 

      Dissolution and it is a chemical change

  • 3. 
    Which of the following provides an example of a true solution?
    • A. 

      Blood

    • B. 

      Milk

    • C. 

      Starch solution

    • D. 

      Sugar solution

  • 4. 
    A solution, which at a given temperature dissolves as much solute as it is capable of dissolving, is said to be a – 
    • A. 

      Saturated solution

    • B. 

      Semi saturated solution

    • C. 

      Unsaturated solution

    • D. 

      Super saturated solution

  • 5. 
    The concentration of solution is the mass of the solute in grams, which is present in – 
    • A. 

      10 gm of solvent

    • B. 

      10 gm of solution

    • C. 

      100 gm of solvent

    • D. 

      100 gm of solution

  • 6. 
    Mixture of sand in water is an example of 
    • A. 

      True solution

    • B. 

      Colloidal solution

    • C. 

      Suspension

    • D. 

      None of the above

  • 7. 
    Which one of the following shows tyndall effect 
    • A. 

      Salt solution

    • B. 

      Milk

    • C. 

      Copper sulphate solution

    • D. 

      Starch solution

  • 8. 
    Tincture of iodine has antiseptic properties. This solution is made by dissolving 
    • A. 

      Iodine in potassium iodide

    • B. 

      Iodine in Vaseline

    • C. 

      Iodine in water

    • D. 

      Iodine in alcohol

  • 9. 
    Which of the following is/are physical change? 
    1. Melting of iron metal
    2. Rusting of iron
    3. Bending of an iron rod
    4. Drawing a wire of iron metal 
    • A. 

      A) b) c)

    • B. 

      A) b) d)

    • C. 

      A) c) d)

    • D. 

      B) c) d)

  • 10. 
    Which of the following is/are chemical change 
    1. decaying of wood
    2. burning of wood
    3. sawing of wood
    4. hammering of a nail in to a piece of wood
    • A. 

      A) b)

    • B. 

      B) c)

    • C. 

      C) d)

    • D. 

      A) d)

  • 11. 
    Air is regarded as a – 
    • A. 

      Compound

    • B. 

      Mixture

    • C. 

      Element

    • D. 

      Electrolyte

  • 12. 
    Which of the following statement is not true about true solution?
    • A. 

      It can pass through filter paper.

    • B. 

      It is homogeneous in nature.

    • C. 

      At constant temperature, particles of solute settle down.

    • D. 

      From a true solution, the solute can easily be recovered by evaporation or crystallization.

  • 13. 
    Butter can be separated from curd by 
    • A. 

      Centrifugation

    • B. 

      Evaporation

    • C. 

      Crystallization

    • D. 

      Sublimation

  • 14. 
    Two chemical species X and Y combine together to form a product P which contains both X and Y.X      +    Y  -------------------PX and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct
    1. P  is  compound
    2. X and Y are compound
    3. X and Y are element
    4. P has a fixed composition
    • A. 

      I, ii and iii

    • B. 

      I, ii and iv

    • C. 

      Ii , iii and iv

    • D. 

      I, iii and iv

  • 15. 
    Crystallization method cannot be used to purify those mixture which​
    • A. 

      Contain insoluble and/ or soluble impurities

    • B. 

      Have crystalline nature

    • C. 

      Either decompose or get charred o heating to dryness that is which cannot be separated by evaporation

    • D. 

      Can be separated by filtration as some impurities are soluble

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