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  • Question 1
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    Which of the following papers is used for separating a mixture of coloured materials?

  • Question 2
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    The impure common salt obtained from sea water is purified with the help of

  • Question 3
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    A mixture of fine suspended particles in liquid can be separated very rapidly with the help of

  • Question 4
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    Which of the following methods is used in washing machines to dry clothes?

  • Question 5
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    Which of the following can be separated from a mixture using sublimation method?

  • Question 6
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    Which of the following options does not represent a physical change?

  • Question 7
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    In which of the following colloids tiny solid particles are dispersed in a liquid medium?

  • Question 8
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    Which of the following options is an example of sol?

  • Question 9
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    A colloid in which _______ is dispersed in _______ is called a foam.

  • Question 10
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    Which of the following colloids is an example of an emulsion?

  • Question 11
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    Which of the following will not show Tyndall effect?

  • Question 12
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    Which of the following statements is true about the physical changes and chemical changes?

  • Question 13
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    Which of the following processes is not an example of a physical change in water?

  • Question 14
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    Which of the following colloidal systems contains solid in the dispersed phase?

  • Question 15
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    Which of the following statements about mixtures is not true?

  • Question 16
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    Which of the following statements is true about mixtures?

  • Question 17
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    Which of the following statements is correct about homogeneous and heterogeneous mixtures?

  • Question 18
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    We have a mixture of four liquids a, b, c and d with boiling points 50oC, 70oC, 80oC and 100oC respectively. Which liquid will separate out first during fractional distillation?

  • Question 19
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    During the separation of dissolved solids by chromatography, which of the following properties of solids is used?

  • Question 20
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    If a maximum of 32 grams of potassium nitrate can be dissolved in 100 grams of water at 20oC, then the solubility of potassium nitrate in water at 20oC will be

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