Question

1. What type of carbocation is shown at the right? A) 0° B) 1° C) 2° D) 3° E) 4° 2. What is the correct order of stability of the carbocations at the right? (more stable > less stable) A) 1 > 2 > 3 B) 1 > 3 > 2 C) 3 > 1 > 2 D) 3 > 2 > 1 E) 2 > 3 > 1 3. Which ONE is the major organic product obtained from the reaction below? H2O / H2SO4 A B C D 4. The most characteristic type of reaction of alkenes is- A) addition B) subtraction C) elimination D) substitution E) decomposition 5. Which ONE of the following reactions takes place with anti-stereospecificity? A) hydrogenation (treatment with H2/Pt) B) hydroboration-oxidation (treatment with BH3 followed by H2O2, NaOH) C) bromohydrin formation (treatment with Br2, H2O) D) hydration (treatment with H2O and H2SO4) E) addition of HBr (treatment with HBr) 6. Which ONE of the following alkenes is most likely to undergo rearrangement (by migration of -H or a -CH3 group) on acid-catalyzed hydration (treatment with aq. H2SO4)? H2C=CH2 A B C D E

          1. What type of carbocation is shown at the right?
A) 0° B) 1° C) 2° D) 3° E) 4°

2. What is the correct order of stability of the carbocations at the right?
(more stable > less stable)
A) 1 > 2 > 3 B) 1 > 3 > 2
C) 3 > 1 > 2 D) 3 > 2 > 1
E) 2 > 3 > 1

3. Which ONE is the major organic product obtained from the reaction below?
H2O / H2SO4
A B C D

4. The most characteristic type of reaction of alkenes is-
A) addition B) subtraction C) elimination D) substitution E) decomposition

5. Which ONE of the following reactions takes place with anti-stereospecificity?
A) hydrogenation (treatment with H2/Pt)
B) hydroboration-oxidation (treatment with BH3 followed by H2O2, NaOH)
C) bromohydrin formation (treatment with Br2, H2O)
D) hydration (treatment with H2O and H2SO4)
E) addition of HBr (treatment with HBr)

6. Which ONE of the following alkenes is most likely to undergo rearrangement (by migration of -H or a -CH3 group) on acid-catalyzed hydration (treatment with aq. H2SO4)?
H2C=CH2 A B C D E

1. What type of carbocation is shown at the right?
A) 0° B) 1° C) 2° D) 3° E) 4°

2. What is the correct order of stability of the carbocations at the right?
(more stable > less stable)
A) 1 > 2 > 3 B) 1 > 3 > 2
C) 3 > 1 > 2 D) 3 > 2 > 1
E) 2 > 3 > 1

3. Which ONE is the major organic product obtained from the reaction below?
H2O / H2SO4
A B C D

4. The most characteristic type of reaction of alkenes is-
A) addition B) subtraction C) elimination D) substitution E) decomposition

5. Which ONE of the following reactions takes place with anti-stereospecificity?
A) hydrogenation (treatment with H2/Pt)
B) hydroboration-oxidation (treatment with BH3 followed by H2O2, NaOH)
C) bromohydrin formation (treatment with Br2, H2O)
D) hydration (treatment with H2O and H2SO4)
E) addition of HBr (treatment with HBr)

6. Which ONE of the following alkenes is most likely to undergo rearrangement (by migration of -H or a -CH3 group) on acid-catalyzed hydration (treatment with aq. H2SO4)?
H2C=CH2 A B C D E

Added by Michael G.

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