Chemistry for JEE Mains 2017, 2017th Edition

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.

   

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 ...