NBS Reagent

Concept Video

ATOQ (Any Time Online Quiz)

1. N-Bromo Succinimide (NBS) is commonly used as a:
   a) Reducing agent
   b) Oxidizing agent
   c) Acid catalyst
   d) Base catalyst
2. NBS is used in organic chemistry for:
   a) Oxidative bromination of alkenes
   b) Reductive dehalogenation
   c) Acid-catalyzed dehydration
   d) Base-catalyzed hydrolysis
3. Which functional group is primarily targeted in the bromination reaction using NBS?
   a) Alkanes
   b) Alkenes
   c) Alcohols
   d) Carboxylic acids
4. NBS undergoes a radical reaction with alkenes. What does it mean?
   a) A carbocation is formed
   b) A bromonium ion is formed
   c) A bromine radical is generated
   d) A free hydrogen radical is produced
5. When NBS is used in bromination reactions, it eliminates the formation of:
   a) Alkyl halides
   b) Dihalogenated products
   c) Tetrahalides
   d) Carbocations
6. NBS is an efficient reagent for the bromination of:
   a) Alkynes
   b) Arenes
   c) Alkanes
   d) Aldehydes
7. The reaction of NBS with alkenes is best conducted in the presence of:
   a) Water
   b) Acid
   c) UV light
   d) Heat
8. Which of the following statements is true regarding NBS?
   a) It is soluble in water
   b) It is a gas at room temperature
   c) It is an odorless compound
   d) It is a strong reducing agent
9. NBS can be prepared by the reaction of succinimide with:
   a) Sodium bromide
   b) Bromine gas
   c) Potassium hydroxide
   d) Hydrogen bromide
10. The bromination reaction using NBS proceeds through a/an:
    a) Electrophilic addition
    b) Nucleophilic substitution
    c) Radical mechanism
    d) Elimination reaction
11. Which type of reaction does NBS undergo when reacting with alcohols?
    a) Esterification
    b) Dehydration
    c) Oxidation
    d) Reduction
12. NBS is commonly used in which field of science?
    a) Physics
    b) Biology
    c) Organic Chemistry
    d) Astronomy
13. The bromination of alkenes using NBS proceeds with:
    a) Syn addition of bromine
    b) Anti addition of bromine
    c) Markovnikov addition of bromine
    d) Electrophilic substitution of bromine
14. NBS is a crystalline solid with a color of:
    a) Yellow
    b) White
    c) Green
    d) Purple
15. The addition of NBS to an alkene results in the formation of a(n):
    a) Alkane
    b) Alkene
    c) Alkyne
    d) Alkyl halide
16. NBS is often used in conjunction with a radical initiator, such as:
    a) Sodium hydroxide (NaOH)
    b) Potassium iodide (KI)
    c) Benzoyl peroxide (BPO)
    d) Hydrogen peroxide (H2O2)
17. NBS can also be used for the bromination of:
    a) Aromatic compounds
    b) Alcohols
    c) Aldehydes
    d) Ketones
18. Which of the following is NOT a use of NBS?
    a) Bromination of alcohols
    b) Conversion of primary alcohols to aldehydes
    c) Halogenation of alkanes
    d) Hydrobromination of alkynes
19. In the presence of light or heat, NBS can generate:
    a) Bromine radicals
    b) Oxygen radicals
    c) Hydrogen radicals
    d) Nitrogen radicals
20. NBS can be utilized for the preparation of:
    a) Bromoalkanes from alkanes
    b) Chloroalkanes from alkenes
    c) Iodoalkanes from alkynes
    d) Fluoroalkanes from arenes

Key

1. b) Oxidizing agent
2. a) Oxidative bromination of alkenes
3. b) Alkenes
4. c) A bromine radical is generated
5. b) Dihalogenated products
6. b) Arenes
7. c) UV light
8. a) It is soluble in water
9. a) Sodium bromide
10. c) Radical mechanism
11. b) Dehydration
12. c) Organic Chemistry
13. a) Syn addition of bromine
14. a) Yellow
15. d) Alkyl halide
16. c) Benzoyl peroxide (BPO)
17. a) Aromatic compounds
18. d) Hydrobromination of alkynes
19. a) Bromine radicals
20. a) Bromoalkanes from alkanes

If you have any more questions or need further information, feel free to ask!