IIT-JEE-Chemistry-Screening-2003

SCREENING
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1.         Among the following the molecule with the highest dipole moment is :
            (a)       CH₃CI
            (b)       CH₂CI₂
            (c)       CHCI₃
(d)       CCI₄


2.         Which of the following are isoelectronic and isostructural?
            NO₃^-, C O₃^2-, CI O₃^-, SO₃
            (a)       N O₃^-, C O₃^2-
            (b)       SO₃, N O₃^-
            (c)       CI O₃^-, C O₃^2-
          (d)       C O₃^2-, SO₃


3.
   chemical-compound

            The product A will be

    chemical-reagent

4.         [X] + H₂SO₄ → [Y] a colourless gas with irritating smell
            [Y] + K₂CrO₇ + H₂SO₄ ® green solution
            [X] and [Y] is:
            (a)       S O₃^2-, SO₂
            (b)       CI^-, HCI
        (c)       S^2-, H₂S
          (d)       C O₃^-, CO₂


5.         For H₃PO₃ and H₃PO₄ the correct choice is:
            (a)       H₃PO₃ is dibasic and reducing
            (b)       H₃PO₃ is dibasic and non-reducing
            (c)       H₃PO₄ is tribasic and reducing
            (d)       H₃PO₃ is tribasic and non-reducing


6.         When MnO₂ is fused with KOH, a coloured compound is formed, the product and its colour is :
            (a)       K₂MnO₄, purple green
            (b)       KMnO₄, purple
            (c)       Mn₂O₃, brown
            (d)       Mn₃O₄ black

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IIT-JEE-Chemistry-Screening-2003

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