An Quiz For Aspiring Organic Chemists

20 Questions | By Qerbar | Last updated: Mar 21, 2022 | Total Attempts: 490

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Organic chemistry Second material exam Bassil Awaqleh

Questions and Answers

1.

Which compound RX reacts MOST rapidly in an S_N2 reaction?
- A.
  
  2-bromohexane A) 2-Bromohexane
- B.
  
  B) 1-Bromo-3-methylhexane
- C.
  
  C) 2-Bromo-2-methylhexane
- D.
  
  D) 3-Bromohexane
2.

Which of the following is the most reactive as Nucleophile?
- A.
  
  PhO-
- B.
  
  PhS-
- C.
  
  PhCH2O-
- D.
  
  PhCH2NH2
3.

Which is the most reactive compound by the SN1 mechanism
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
4.

What is the IUPAC name of the following compound?
- A.
  
  A) (2S, 3S)-2,3-dibromopentane
- B.
  
  B) (2S, 3R)-2,3-dibromopentane
- C.
  
  C) (2R, 3S)-2,3-dibromopentane
- D.
  
  D) (2R, 3R)-2,3-dibromopentane
5.

How many stereocenters are there in the following molecule?
- A.
  
  2
- B.
  
  0
- C.
  
  3
- D.
  
  1
6.

Which of the following groups has the highest priority in the (R,S) system?
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
7.

Give the product(s) of the following reaction?
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  A mixture of A and B
8.

Identify the substitution product(s) in the following reaction
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  A mixture of A and B
9.

What is the electrophile in the Friedel-Crafts alkylation reaction below?
- A.
  
  AlCl3
- B.
  
  Cl-
- C.
  
  (CH3)3C+
- D.
  
  Benzene
10.

Which one of the following compounds undergoes electrophilic aromatic sulfonation at the fastest rate?
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
11.

Nitration of chlorobenzene has a reaction rate which is __________ than the nitration rate of benzene and gives primarily the _____________ product(s)
- A.
  
  A) faster, ortho/para
- B.
  
  B) faster, meta
- C.
  
  C) slower, ortho/para
- D.
  
  D) slower , meta
12.

Identify the major product(s) of the reaction sequence shown below
- A.
  
  A) ortho and para-chloroacetophenone
- B.
  
  B) meta-chloroacetophenone
- C.
  
  C) ortho and para-chlorobenzaldehydeB
- D.
  
  D) meta-chlorobenzaldehydeAns
13.

Predict which position of the naphthalene compound below is the most reactive with electrophiles in electrophilic aromatic substitution
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
14.

Which of the following statements true?
- A.
  
  A. All molecules that have chirality centers are chiral
- B.
  
  B. Superimposable structures are enantiomers
- C.
  
  C. All compounds with mirror images are enantiomers Option 3
- D.
  
  d. Isomers that are not superimposable on their mirror images are enantiomers
15.

Which of the following structures is different from the other three?
- A.
  
  1
- B.
  
  4
- C.
  
  2
- D.
  
  3
16.

Which of the following Fischer projections is different from the other three?
- A.
  
  2
- B.
  
  3
- C.
  
  1
- D.
  
  4
17.

The product(s) of the following reaction are ?
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  A + B
18.

What is the MOST reactive alkyl halide for the following reaction?
- A.
  
  Option 1
- B.
  
  Option 2
- C.
  
  Option 3
- D.
  
  Option 4
19.

Azide anion (N3)- is a very good Nu , predict the major product for the following reaction ?
- A.
  
  Option 1
- B.
  
  Option 2
- C.
  
  Option 3
- D.
  
  Option 4
20.

In substitution reaction of (CH3)CBr with H2O doubling the concentration of both substance and Nu lead to :
- A.
  
  Doubling the rate
- B.
  
  Tripling the rate
- C.
  
  No change
- D.
  
  Quadrupling the rate