Which one of the following species is not an electrophile ?

Related Mcqs:

1. During sulphonation of benzene H2SO4 generates the electrophile _________________?

   A. HSO4-
   B. SO2
   C. SO3
   D. H+

2. Which of the following are isoelectronic species ?

   A. H+ H H-
   B. Li+ Na+ K+
   C. C1- Br- I
   D. F- Ne Na+

3. Which of the following set has all species isoelectronic__________________?

   A. F – Cl – Br
   B. Li+1 – Na+1 – K+1
   C. F – Ne – Na+
   D. H+ – H- – H

4. The species which donate two electron pairs in a coordination compound is called__________________?

   A. ligand
   B. mono-dentate ligand
   C. poly-dentate ligand
   D. bi-dentate ligand

5. In an electrolysis of aqueous Sodium Flouride, the species that moves towards Anode is _________?

   A. Flouride
   B. Sodium
   C. H²O
   D. None of them

   Submitted by: Aamir khan Hullio

6. Species are formed in one step of reaction mechanism and used up in another step are called:

   A. Catalyst
   B. Intermediate
   C. inhibitor
   D. activated complex

   Submitted by: Said wali shah

7. When benzene is substituted by halogens only which one of the following halogens only which one of the following halogens is given the number one position in the ring while writing the name of compound ?

   A. Bromine
   B. Chlorine
   C. Fluorine
   D. Iodine

8. Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone ?

   A. primary alcohol
   B. secondary alcohol
   C. tertiary alcohol
   D. dihydric alcohol

9. Which alkyl halide out of the following may follow both SN1 and SN2 mechanism ?

   A. CH3-X
   B. (CH3)3 C-CH2 – X
   C. (CH3)2 CH – X
   D. (CH3)3 C – X

10. Which one of the following reactants will be required to form straight chain alcohol by using Grignard reagent________________?

    A. formaldehyde
    B. ketone
    C. ethylene epoxide
    D. both A & C