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Acids Bases and Salts Test - 4

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Acids Bases and Salts Test - 4
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Weekly Quiz Competition
  • Question 1
    1 / -0

    Sodium hydroxide is an example of

    Solution

    Sodium hydroxide completely dissociates to produce sodium ions and hydroxide ions and is a strong base.

     

  • Question 2
    1 / -0

    Identify the type of reaction: HCl + NaOH  →  NaCl + H2O

    Solution

    Neutralisation reaction is a reaction in which acid reacts with a  base to form salt and water.

    HCl + NaOH  → NaCl +   H2O

     

  • Question 3
    1 / -0

    When a drop of an unknown solution X is placed on a strip of pH paper, a deep blue colour is produced. This sample should be which one of the following?

    Solution

    Deep blue colour of pH paper is shown by substances havong pH between 9 - 10. Since these pH values are shown by bases hence, NaOH will show up this colour.

     

  • Question 4
    1 / -0

    The number of molecules of water of crystallization present in washing soda are

    Solution

    Washing soda has formula Na2CO3.10 H2O.Hence, it has 10 molecules of water of crystallization.

     

  • Question 5
    1 / -0

    Which of the following salt is basic in nature?

    Solution

    Sodium acetate is basic in nature. It is a salt formed by neutralization of weak acid and strong base.

     

  • Question 6
    1 / -0

    Which of the following is used for disinfecting drinking water to make it free from germs?

    Solution

    Bleaching power is used for disinfecting drinking water to make it free from germs.

     

  • Question 7
    1 / -0

    The natural source of acetic acid is

    Solution

    Oxalic acid is found in tomatoes, lactic acid in curd and acetic acid is found in vinegar.

     

  • Question 8
    1 / -0

    Carbon dioxide is an example of

    Solution

    Non-metallic oxides are acidic in nature.

     

  • Question 9
    1 / -0

    The reaction of dissociation of potassium hydroxide which is a strong base in aqueous solution is

    Solution

    Potassium hydroxide is a strong base and dissociates completely in aqueous solution.

    KOH(aq) → K+(aq) + OH-(aq)

     

  • Question 10
    1 / -0

    A solution has a pH value of 11. What kind of a substance is it?

    Solution

    Solutions having pH values of 11, 12, 13 and 14 are usually considered strong bases.

     

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