Tuesday, April 8, 2008

1. Identify electrophiles from the followings.

A. SO2 B. CH3OH C. CF3COOOH D. Pyridine.

2. Identify nucleophiles from the followings.

A. SO3 B. SO2Cl2 C. H2O D. POCl3..

3. Which one of the followings is strongest nucleophiles in SN2 in proteic solvents.

A. CH3S- B. I- C.H2O D F-

4. Which one of the followings is strongest nucleophiles in SN2 in proteic solvents.

A. I- B. Br- C. Cl- D. F-

5. Which one of the followings is strongest nucleophiles in SN2 in proteic solvents.

A. OH- B. ArO- C. CH3COO- D. H2O

6. Which one of the followings is strongest nucleophiles in SN2 in proteic solvents.

A. NH3 B. NH2- C. LDA D. DBU.

7. Which one of the followings is strongest nucleophiles in SN2 in proteic solvents.

A. NH3 B. CH3NH2 C. (CH3)2NH D.(CH3)3N

8. Which one of the followings is strongest nucleophiles in SN2 in Aproteic solvents.

A. I- B. Br- C. Cl- D. F-

9. Identify electrophiles from the followings.

A. CH4 B. H20 C. HOCl D. CH3MgBr

10. Identify electrophiles from the followings.

A. CCl4 B. P(Ph)3 C. C6H6 D. CH3COCl

ans. 1. C 2 C 3 A 4 A 5 A 6 B 7 B 8 D 9 C 10. B

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