Mock Test 4

  1. Red precipitate is obtained when ethanol solution of dimethylglyoxime is added to ammoniacal Ni(II).

    Which of the following statements is not true?

    1. Red complex has a tetrahedral geometry
    2. Complex has symmetrical H-bonding
    3. Red complex has a square planar geometry.
    4. Dimethylglyoxime functions as bidentate ligand.

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  2. During change of O2 to O2− ion, the electron adds on which one of the following orbitals ?
    a. π*orbital b. σ orbital
    c. σ* orbital d. π orbital

     

  3. Consider the reaction:
    RCHO + NH2NH2 → RCH = N – NH2

    What sort of reaction is it?

    1. Electrophilic substitution –elemination reaction
    2. Free radical addition – elimination ...

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