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Chemical Analysis Test - 1

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Chemical Analysis Test - 1
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  • Question 1
    1 / -0

    The metal that does not give the borax-bead test is

    Solution

    Borax bead test is generally given by transition elements.

     

  • Question 2
    1 / -0

    The alkaline earth metal that imparts apple green colour to the bunsen flame when introduced in it in the form of its chloride is

    Solution

    Ba2+ imparts green colour to the flame.

     

  • Question 3
    1 / -0

    Which gives violet coloured bead in borax bead test

    Solution

    As Mn+2 has all it’s electrons (5) unpaired in it’s d-orbital, so it’s extra stable configuration requires high excitation energy and so it gives violet colour.

     

  • Question 4
    1 / -0

    Which one of the following metals will give blue ash when its salt is heated with Na2CO3 solid and Co(NO3)2 on a charcoal piece

    Solution

    CoAlO2 is formed which is blue. Follow cobalt nitrate-charcoal test.

     

  • Question 5
    1 / -0

    The metal that does not give the borax bead test is

    Solution

    Metals which form basic compounds and have coloured salts give the borax bead test.

     

  • Question 6
    1 / -0

    Which one of the following salt give green coloured flame when the salt is tested by Pt wire

    Solution

    Barium salt gives green coloured flame as it has low ionization energy

     

  • Question 7
    1 / -0

    A precipitate of calcium oxalate will not dissolve in

    Solution

    Calcium oxalate will not dissolve in acetic acid (weak acid) but only in strong acid

     

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