Organic Chemistry Questions and Answers – Nucleophiles | Organic Chemistry Multiple Choice Questions and Answers

Questions
1 Which of the following is not true about nucleophile?
A donates an electron pair to an electrophile to form a chemical bond
B all molecules or ions with a free pair of electrons or at least one pi bond can act as nucleophiles
C nucleophile are Lewis acids by definition
D a nucleophile becomes attracted to a full or partial positive charge

Answer: nucleophile are Lewis acids by definition
2 Which halogen nucleophile is weakest in polar, aprotic solvents?
A I–
B F–
C Cl–
D Br–

Answer: I–
3 Which of the following nucleophile can be used for partial enolization 1,3-Dicarbonyl compound?
A Lithium di-isopropyl amide (LDA)
B Et-O–
C Weak base like NaOH
D Sodium acetate

Answer: Sodium acetate
4 What will be the number of products (excluding stereoisomers) in the given reaction?

C6H5CHO + CH3-CHO + NaOH → Product

A One
B Three
C Two
D Four

Answer: Two
5 Where will nucleophile (-OH) will attack to form which of the following the product X?

Oraganic Chemistry MCQ

Oraganic Chemistry MCQ

A (a)
B (b)
C (c)
D (d)

Answer: (d)
6 Which reagent is a good nucleophile?
A NH3
B BH3
C Br2
D HBr

Answer: NH3
7 Which of the following statements is true about ammonia and water?
A ammonia is more basic and more nucleophilic than water
B ammonia is less basic and less nucleophilic than water
C ammonia is more basic but less nucleophilic than water
D ammonia is less basic but more nucleophilic than water

Answer: ammonia is more basic and more nucleophilic than water
8 Which of the following statements is true about the following two anionic molecules?

Organic Chemistry

A I is more basic and more nucleophilic than II
B I is less basic and less nucleophilic than II
C I is more basic but less nucleophilic than II
D I is less basic but more nucleophilic than II

Answer: I is more basic but less nucleophilic than II
9 Which halide ion is the best nucleophile in dimethyl sulfoxide solution?
A I–
B F–
C Cl–
D Br–

Answer: F–
10 Which of the following cannot react as a nucleophile?
A CH3NH2
B (CH3)2NH
C (CH3)3N
D (CH3)4N+

Answer: (CH3)4N+
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