Strong Nucleophile in polar aprotic solvent?

Related Mcqs:

1. Which one is not a nucleophile ?

   A. C2H5O-
   B. SCN-
   C. NH3
   D. H3C+

2. Alkyl halides are considered to be very reactive compounds towards nucleophile because_________________?

   A. they have an electrophilic carbon
   B. they have an electrophilic carbon & a good leaving group
   C. they have an electrophilic carbon & a bad leaving group
   D. they have a nucleophilic carbon & a good leaving group

3. Which of the following is the best explanation that CO2 is non polar molecule __________________?

   A. Linear geometry
   B. Dipole moment is zero
   C. Sp hybridization
   D. None

4. Which one of the following has polar covalent bond ?

   A. HF
   B. CH4
   C. H2
   D. N2

5. Benzene is a good solvent for__________________?

   A. fats
   B. resins
   C. iodine
   D. all the above

6. A technique of partition chromatography in which the solvent is in a pool at the bottom of container_______________?

   A. Adsorption chromatography
   B. Ascending chromatography
   C. Radial chromatography
   D. Descending chromatography

7. In crystallization if the solvent is inflammable then direct heating is________________?

   A. needed
   B. avoided
   C. depends on temperature
   D. crystallization does not involve heating

8. The solvent or mixture of solvents used for separation of compounds is called____________________?

   A. Stationary phase
   B. Mobile phase
   C. Dynamic phase
   D. Static phase

9. Number of moles in 1 kg of solvent is called_________________?

   A. normality
   B. molarity
   C. molality
   D. mole fraction

10. Solvent used in separation of biomolecules is _______________?

    A. Acetone
    B. Trichloroacetic acid
    C. Ether
    D. Alcohol

    Submitted by: Safeullah Bullo