IV Он O1 = aldehyde; II = alkyne; III = alcohol; IV = alkene O 1 = ketone; I| = alkene; III = alcohol; IV = alkyne O 1 = ketone; I| = aromatic; III = alcohol; IV = alkyne O1 = anhydride; II = alkene; III = carboxylic acid; IV = alkene O 1 = ester; I| = alkene; III = alcohol; IV = alkyne

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### Norethynodrel Functional Groups Identification

**Question:**
Norethynodrel, a component of the first combined oral contraceptive, has the following structure. Identify the functional groups indicated in Norethynodrel.

**Structure Diagram:**
The provided structure diagram shows a complex organic molecule with numbered points that indicate different functional groups. The labels on the diagram are as follows:

- I
- II
- III
- IV

**Answer Choices:**
1. ○ I = aldehyde; II = alkyne; III = alcohol; IV = alkene
2. ○ I = ketone; II = alkene; III = alcohol; IV = alkyne
3. ○ I = ketone; II = aromatic; III = alcohol; IV = alkyne
4. ○ I = anhydride; II = alkene; III = carboxylic acid; IV = alkene
5. ○ I = ester; II = alkene; III = alcohol; IV = alkyne

**Explanation of the Structure Diagram:**
The structure diagram of Norethynodrel consists of several rings and multiple double and triple bonds, along with hydroxyl (OH) and carbonyl (C=O) groups. 

1. **Functional Group I:** This point indicates a carbonyl group, most commonly found in ketones or aldehydes.
2. **Functional Group II:** This point indicates a triple bond (C≡C), which characterizes an alkyne.
3. **Functional Group III:** This point indicates a hydroxyl group (-OH), characteristic of alcohols.
4. **Functional Group IV:** This point indicates a double bond (C=C), characteristic of alkenes.

**Correct Answer:**
The correct identification of functional groups in Norethynodrel is:

- ○ I = ketone; II = alkene; III = alcohol; IV = alkyne

This corresponds to the second option in the given answer choices.
Transcribed Image Text:### Norethynodrel Functional Groups Identification **Question:** Norethynodrel, a component of the first combined oral contraceptive, has the following structure. Identify the functional groups indicated in Norethynodrel. **Structure Diagram:** The provided structure diagram shows a complex organic molecule with numbered points that indicate different functional groups. The labels on the diagram are as follows: - I - II - III - IV **Answer Choices:** 1. ○ I = aldehyde; II = alkyne; III = alcohol; IV = alkene 2. ○ I = ketone; II = alkene; III = alcohol; IV = alkyne 3. ○ I = ketone; II = aromatic; III = alcohol; IV = alkyne 4. ○ I = anhydride; II = alkene; III = carboxylic acid; IV = alkene 5. ○ I = ester; II = alkene; III = alcohol; IV = alkyne **Explanation of the Structure Diagram:** The structure diagram of Norethynodrel consists of several rings and multiple double and triple bonds, along with hydroxyl (OH) and carbonyl (C=O) groups. 1. **Functional Group I:** This point indicates a carbonyl group, most commonly found in ketones or aldehydes. 2. **Functional Group II:** This point indicates a triple bond (C≡C), which characterizes an alkyne. 3. **Functional Group III:** This point indicates a hydroxyl group (-OH), characteristic of alcohols. 4. **Functional Group IV:** This point indicates a double bond (C=C), characteristic of alkenes. **Correct Answer:** The correct identification of functional groups in Norethynodrel is: - ○ I = ketone; II = alkene; III = alcohol; IV = alkyne This corresponds to the second option in the given answer choices.
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