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P - Block Eleme...

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  • Question 1
    4 / -1

    Iron is dropped in dil. HNO3, it gives

  • Question 2
    4 / -1

    When plants and animals decay, the organic nitrogen is converted into inorganic nitrogen. The inorganic nitrogen is in the form of

  • Question 3
    4 / -1

    Which of the following is not correct ?

  • Question 4
    4 / -1

    The structure of orthophosphoric acid is

  • Question 5
    4 / -1

    Which of the following is a tribasic acid ?

  • Question 6
    4 / -1

    Consider the following statements.
    I. NCl5 does not exist while PCl5 does.
    II. Both O+2 and NO are paramagnetic.
    III. The three C—O bonds are not equal in carbonate ion.
    IV. Lead prefers to form tetravalent compound.
    Which of the above statements are incorrect ?

  • Question 7
    4 / -1

    When the substances CCl4 , CH4 and CF4 are arranged in order of increasing boiling point, what is the correct order ?

  • Question 8
    4 / -1

    A crystalline solid X reacts with dil. HCl to liberate a gas Y. Y decolourises acidified KMnO4. When a gas Z is slowly passed into an aqueous solution of Y, colloidal sulphur is obtained X and Z could be respectively

  • Question 9
    4 / -1

  • Question 10
    4 / -1

    The correct statements (s) about O3 is (are)

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