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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

    Which of the following salts is insoluble in water?

    Solution

    Calcium sulphate usually does not react with water. It results in a hydrated salt. Its solubility is also very less in water.

     

  • Question 2
    1 / -0

    Potassium ferrocyanide is a

    Solution

    A complex compound is a compound formed from a Lewis acid and a Lewis base. They do not dissociate into its constituent ions in solutions.
    e.g. Fe(CN)2 + 4KCN ---> K4[Fe(CN)6]

    K4[Fe(CN)6] on dissociation gives 4K+ + [Fe(CN)6]4-.

     

  • Question 3
    1 / -0

    Which among the following is not an alkali?

    Solution

    An alkali is a water-soluble base. As Cu(OH)2 is not soluble in water, it is not an alkali.

     

  • Question 4
    1 / -0

    Which of the following solutions can cause a strip of onion to lose its odour?

    Solution

    Onion has a characteristic smell and is used as an olfactory indicator. When a basic solution like sodium hydroxide solution is added to a cloth strip treated with onions, the odour cannot be detected. However, the odour is retained with acidic solutions.

     

  • Question 5
    1 / -0

    Which of the following acids is present in ant sting?

    Solution

    Methanoic acid (also called formic acid) is the simplest carboxylic acid. The chemical formula is HCOOH. It is an important intermediate in chemical synthesis and occurs naturally, most notably in some ants.

     

  • Question 6
    1 / -0

    Which of the following is a dibasic acid?

    Solution

    A dibasic acid is an acid that has two hydrogen ions to donate to a base in an acid-base reaction. Therefore, a dibasic molecule has two replaceable hydrogen atoms. Sulphuric acid (H2SO4) is a dibasic acid.

     

  • Question 7
    1 / -0

    Which of the following is a triacidic base?

    Solution

    Aluminium hydroxide is a triacidic base because it will give three OH- ions.

     

  • Question 8
    1 / -0

    Which of the following indicators shows colour changes in the entire pH range?

    Solution

    Universal indicator is formed by mixing different indicators and shows a colour change in the entire pH range.

    Hence, it is used to compare the relative strength of acids and bases.

     

  • Question 9
    1 / -0

    Which of the following gases is evolved when metal hydrogen carbonate reacts with an acid?

    Solution

    When a metal hydrogen carbonate reacts with an acid, carbon dioxide gas is evolved along with the formation of a salt.

     

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