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p-Block Elements Test - 16

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p-Block Elements Test - 16
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  • Question 1
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    Which of the following halogens has some metallic character?

    Solution

    Iodine is essentially a non-metal, but it has some metallic properties. It is solid at room temperature and has a metallic lustre. It also shows a positive oxidation state in many of its compounds.

    Note: Fluorine (F), chlorine (Cl), bromine (Br) and iodine (I) are all halogens, and non-metallic character decreases down the group. Hence, iodine shows some metallic properties.

     

  • Question 2
    1 / -0

    Choose the first noble gas compound from the following which was prepared Bartlett.

    Solution

    Bartlett's main specialty was the chemistry of fluorine and of compounds containing fluorine. In 1962, Bartlett prepared the first noble gas compound, xenon hexafluoroplatinate, Xe+[PtF6]−.

     

  • Question 3
    1 / -0

    The solubility of noble gases in water increases with increase in their

    Solution

    The solubility of noble gases increase with increase in their molecular weight due to increase in their polarizability. However, these are sparingly soluble.

     

  • Question 4
    1 / -0

    Arrange the following acids in decreasing order of their acidic strength.

    ClOH (I), BrOH (II), IOH (III)

    Solution

    Acidic strength decreases on moving down a group.

     

  • Question 5
    1 / -0

    Aqueous solutions of hydrogen sulphide and sulphur dioxide, when mixed together, yield

    Solution

    2H2S + SO2 → 2H2O + 3S

     

  • Question 6
    1 / -0

    Bromine is liberated when an aqueous solution of potassium bromide is treated with

    Solution

    Cl2 (g) + 2KBr (aq) → Br2 (l) + 2KCl (aq)

    This is a simple displacement as chlorine is more reactive than bromine.

     

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