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The p-Block Elements Test - 6

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The p-Block Elements Test - 6
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  • Question 1
    1 / -0

    Which of the following is prepared by cyanamide process?

    Solution

    CaCN2 +3H2O → CaCO3 + 2NH3↑ when calcium cyanamide is treated with super heated steam at 1800C under a pressure of 3 to 4 atm, ammonia is formed.

  • Question 2
    1 / -0

    Ozone can be detected by using

    Solution

    Ozone is detected by using Hg.
    When ozone is passed through mercury, it loses its meniscus and sticks to the glass due to the formation of mercurous oxide. This is called tailing of mercury.
    2Hg(s) + O3 (g) → Hg2O (s)+ O2(g)

  • Question 3
    1 / -0

    Name the gas whose formula was established by Sorret.

    Solution

    Sorret established formula of ozone and pointed out that ozone is an allotrope of oxygen.

  • Question 4
    1 / -0

    Which of the following is Paramagnetic?

    Solution

    NO is paramagnetic. Its due unpaired electron present in antibonding molecular orbital.

  • Question 5
    1 / -0

    Laughing gas is soluble in

    Solution

    N2O is fairly soluble cold water but not in hot water.

  • Question 6
    1 / -0

    In XeO3 and XeF6 the oxidation state of Xe is

    Solution

    The  oxidation state of Xe is +6. XeO3 , the oxidation of Xe is calculated as x+3(-2)= 0 gives x= +6.

    Similarly, for XeF6 , x + 6(-1) = 0 which is x = +6.

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