Question 1

From the following molecules, pick out those which are meso. Please select all that apply.

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E

Question 2

For the following reaction, pick out the product:

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E

Question 3

For the following reaction, how many stereoisomeric products are formed?

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   4

Question 4

Ozonolysis of alkenes can lead to the formation of carbonyl derivatives. From the following reaction, pick out those alkenes which lead to formation of the given ketones. Please select all that apply.

Accepted Answer

A)   A
B)   B
C)   C
D)   D B, C

Question 5

Identify the first-formed ionic intermediate generated upon the reaction of HBr with but-1-yne.

Accepted Answer

A)   A
B)   B
C)   C
D)   D

Question 6

For the following reaction, pick out the product:

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E

Question 7

Identify suitable conditions 'X' to effect the reaction below. Please select all that apply.
2S B)  Zn C)  PPh3 D)  H2O2" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   Me2S
B)   Zn
C)   PPh3
D)   H2O2

Question 8

From the following reactions, A-D, pick out those which lead to the formation of pent-1-yne. Please select all that apply.

Accepted Answer

A)   A
B)   B
C)   C
D)   D

Question 9

For the following transformation, pick a suitable reagent from A-E:

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E

Question 10

Mass spectrometry can be used to reliably determine whether an alkene is of E or Z configuration.

Accepted Answer

A) True 
 B)False

Question 11

For the following reaction, pick out the product:

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E

Question 12

What is the major product of the following reaction?

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E A

Question 13

Identify which pair of products would form in the following reaction:

Accepted Answer

A)   Products A
B)   Products B
C)   Products C
D)   Products D

Question 14

Which of the following dienes is the most stable?

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E

Question 15

From the following reaction sequence, match the reagents to each step:
 3 A)  Step 2 B)  Step 3 C)  Step 1" class="answers-bank-image d-inline" rel="preload" >
-Na in NH3

Accepted Answer

A)   Step 2
B)   Step 3
C)   Step 1

Question 16

For the following reaction, pick out the product:

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E

Question 17

For the following reaction, pick out the products. Please select all that apply.

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E C, D

Question 18

From the following reaction sequence, match the reagents to each step:
 2 A)  Step 2 B)  Step 3 C)  Step 1" class="answers-bank-image d-inline" rel="preload" >
-NaNH2

Accepted Answer

A)   Step 2
B)   Step 3
C)   Step 1

Question 19

From the following alkenes, pick out the strongest nucleophile:

Accepted Answer

A)   A
B)   B
C)   C
D)   D

Question 20

For the following transformation, pick a suitable reagent(s)  from A-E:
2 B: HBr C: HBr, ROOR D: Br2, hv E: NaBr A)  A B)  B C)  C D)  D E)  E" class="answers-bank-image d-inline" rel="preload" > A: Br2
B: HBr
C: HBr, ROOR
D: Br2, hv
E: NaBr

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E

Exam 21: Alkenes and Alkynes: Electrophilic Addition and Pericyclic Reactions

From the following molecules, pick out those which are meso. Please select all that apply.

Correct AnswerverifiedShow Answer

For the following reaction, pick out the product:

Correct AnswerverifiedShow Answer

For the following reaction, how many stereoisomeric products are formed?

Correct AnswerverifiedShow Answer

Ozonolysis of alkenes can lead to the formation of carbonyl derivatives. From the following reaction, pick out those alkenes which lead to formation of the given ketones. Please select all that apply.

Correct AnswerverifiedB, C

Identify the first-formed ionic intermediate generated upon the reaction of HBr with but-1-yne.

Correct AnswerverifiedShow Answer

For the following reaction, pick out the product:

Correct AnswerverifiedShow Answer

Identify suitable conditions 'X' to effect the reaction below. Please select all that apply.

Correct AnswerverifiedShow Answer

From the following reactions, A-D, pick out those which lead to the formation of pent-1-yne. Please select all that apply.

Correct AnswerverifiedShow Answer

For the following transformation, pick a suitable reagent from A-E:

Correct AnswerverifiedShow Answer

Mass spectrometry can be used to reliably determine whether an alkene is of E or Z configuration.

Correct AnswerverifiedShow Answer

For the following reaction, pick out the product:

Correct AnswerverifiedShow Answer

What is the major product of the following reaction?

Correct AnswerverifiedA

Identify which pair of products would form in the following reaction:

Correct AnswerverifiedShow Answer

Which of the following dienes is the most stable?

Correct AnswerverifiedShow Answer

From the following reaction sequence, match the reagents to each step: -Na in NH3

Correct AnswerverifiedShow Answer

For the following reaction, pick out the product:

Correct AnswerverifiedShow Answer

For the following reaction, pick out the products. Please select all that apply.

Correct AnswerverifiedC, D

From the following reaction sequence, match the reagents to each step: -NaNH2

Correct AnswerverifiedShow Answer

From the following alkenes, pick out the strongest nucleophile:

Correct AnswerverifiedShow Answer

For the following transformation, pick a suitable reagent(s) from A-E: A: Br2 B: HBr C: HBr, ROOR D: Br2, hv E: NaBr

Correct AnswerverifiedShow Answer

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B, C

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A

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From the following reaction sequence, match the reagents to each step: -Na in NH₃

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C, D

From the following reaction sequence, match the reagents to each step: -NaNH₂

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For the following transformation, pick a suitable reagent(s) from A-E: A: Br₂ B: HBr C: HBr, ROOR D: Br₂, hv E: NaBr

Correct Answer
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