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Separation of Substances Test - 8

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Separation of Substances Test - 8
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Weekly Quiz Competition
  • Question 1
    1 / -0
    A mixture of pepper and sand can be dissolved in water. The mixture can be separated by the method ____________.
    Solution
    This method is used for the complete separation of an insoluble solid from liquid. A mixture of pepper and sand can be separated by dissolution of mixture in water followed by filtration.
  • Question 2
    1 / -0
    How will you test given solution is saturated or not?
    Solution
    Add more solute, if it dissolves, it is unsaturated. If it does not dissolve, it is saturated.
  • Question 3
    1 / -0

    Which technique can be used to separate iron from a mixture of iron and copper?

    Solution
    As iron can be attracted by magnets, so magnetic separation method can be used to separate iron from the mixture of iron and copper.

    Hence, option B is correct.
  • Question 4
    1 / -0
    Evaporation is used to separate:
    Solution
    Evaporation is used to separate a non-volatile soluble salt from a liquid. On heating, the liquid evaporates and soluble salt remains behind. The answer is salt from water.

    Hence, option A is correct.
  • Question 5
    1 / -0
    What is a saturated solution?
  • Question 6
    1 / -0
    Which of these terms indicate there is a large quantity of solute, compared with the amount of solvent, in a solution?
    Solution
    The term 'concentrated' indicates there is a large quantity of solute, compared with the amount of solvent, in a solution. The descriptive term 'dilute' indicates there is a small quantity of solute, compared with the amount of solvent, in a solution.

    The other terms, soluble and insoluble, imply whether or not a solute dissolves in a solvent. Exhaustible is not a term that is used for solutions. It simply means something that tends to reduce in quantity depending on usage.
  • Question 7
    1 / -0
    Find out the correct statement regarding a saturated solution of salt in water?
    Solution
    The correct statement regarding a saturated solution of salt in water is that an equilibrium has been established.
    The rate of dissolution of solute into the solution is equal to the rate of coming out of the solution.
    Two rates are equal which represents equilibrium condition at which optimum amount of solute is present in the solution.
    Note: A solution which contains the maximum amount of the solute that can be dissolved in a given amount of the solvent at a particular temperature is called a saturated solution.
  • Question 8
    1 / -0
    Assertion: A saturated solution is not necessarily concentrated.

    Reason: Dilute and concentrated are terms that signify only the relative amount of solute dissolved in a solvent
    Solution
    Assertion: A saturated solution is not necessarily concentrated.
    A saturated solution can be either dilute or concentrated, depending on the solubility of a solute in a particular solvent. The amount of solute needed to make a saturated solution depends on the solubility of a solute in a particular solvent.
    • If the solute is highly soluble, a saturated solution will be
    very concentrated.
    • If the solute has low solubility, the saturated solution will
    be diluted.

    Reason: Dilute and concentrated are terms that signify only the relative amount of solute dissolved in a solvent. The amount of solute in a concentrated solution is much more than the amount of solute in a dilute solution. They don't actually signify or indicate the solubility of the solute in a particular solution.

    Both assertion and reason are correct and the reason is the correct explanation of assertion.
  • Question 9
    1 / -0
    Components of a mixture which are separated by sieving, get separated based on their:
    Solution
    Sieving method is used for separating solid constituents of a mixture that differ in their size.
  • Question 10
    1 / -0
    The rate of going into the solution is equal to the rate of coming out of the solution that indicates the solution is :
    Solution
    The rate of going into the solution is equal to the rate of coming out of the solution that indicates the solution is saturated. Two rates are equal which represents equilibrium condition at which optimum amount of solute is present in the solution.
    $$\text{Note:}$$ A solution which contains the maximum amount of the solute that can be dissolved in a given amount of the solvent at a particular temperature is called a saturated solution.
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