Unit 10: Alkyl Halides

21. The type of alkyl halide that undergoes SN2 reactions most readily is:

a) Primary alkyl halide
b) Secondary alkyl halide
c) Tertiary alkyl halide
d) Aromatic alkyl halide
Answer: a) Primary alkyl halide

22. In an SN1 reaction, the formation of the carbocation intermediate is:

a) Rate-determining
b) Not rate-determining
c) A secondary step
d) A product-forming step
Answer: a) Rate-determining

23. The elimination reaction of alkyl halides often leads to the formation of:

a) Alkanes
b) Alkenes
c) Alkynes
d) Aromatic hydrocarbons
Answer: b) Alkenes

24. The reagent used to convert alkyl halides to alkenes in an elimination reaction is:

a) Sodium hydroxide
b) Hydrogen chloride
c) Sodium amide
d) Ethanol
Answer: c) Sodium amide

25. The preferred halogen for an SN2 reaction is:

a) Fluorine
b) Chlorine
c) Bromine
d) Iodine
Answer: d) Iodine

26. The common test for the presence of alkyl halides involves:

a) Silver nitrate
b) Bromine water
c) Sodium hydroxide
d) Sulfuric acid
Answer: a) Silver nitrate

27. The type of alkyl halide that undergoes SN1 reactions most readily is:

a) Primary alkyl halide
b) Secondary alkyl halide
c) Tertiary alkyl halide
d) Aromatic alkyl halide
Answer: c) Tertiary alkyl halide

28. The formation of an alkyl halide from an alcohol can be achieved using:

a) Hydrogen bromide
b) Sodium hydroxide
c) Sodium carbonate
d) Potassium permanganate
Answer: a) Hydrogen bromide

29. The most stable carbocation intermediate is:

a) Primary
b) Secondary
c) Tertiary
d) Quaternary
Answer: c) Tertiary

30. The reactivity of alkyl halides in SN2 reactions generally decreases with:

a) Increasing alkyl substitution
b) Decreasing alkyl substitution
c) Increasing nucleophile strength
d) Increasing solvent polarity
Answer: a) Increasing alkyl substitution