Chemistry Class 11 NCERT Solutions: Chapter 12 Organic Chemistry Some Basic Principles and Techniques Part 4

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Q: 7. Give condensed and bond line structural formulas and identify the functional group(s) present, if any, for:

(A) Trimethylpentane

(B) 2 – Hydroxy propanetricarboxylic acid

(C) Hexanedial

Answer:

(A) Trimethylpentane

Condensed formula:

Bond line formula:

Q 7 A Structure of Trimethylpentane

Q 7 a Structure of Trimethylpentane

Q 7 A Structure of Trimethylpentane

(B) 2- hydroxy propanetricarboxylic acid

Condensed Formula:

Bond line formula:

Q 7 B Structure of 2- hydroxy – 1, 2, 3 – propanetricarboxylic acid.

Q 7 B Structure of 2- Hydroxy – 1, 2, 3 – Propanetricarboxylic Acid

Q 7 B Structure of 2- hydroxy – 1, 2, 3 – propanetricarboxylic acid.

The functional groups present in the given compound are carboxylic acid and alcoholic groups.

(C) Hexanedial

Condensed Formula:

Bond line Formula:

Q 7 C Structure of Hexanedial

Q 7 C Structure of Hexanedial

Q 7 C Structure of Hexanedial

The functional group present in the given compound is aldehyde

Q: 8. Identify the functional groups in the following compounds

(A)

Q 8 A Structure of Functional Groups in Compounds

Q 8 a Structure of Functional Groups in Compounds

Q 8 A Structure of Functional Groups in Compounds

(B)

Q 8 B Structure of Functional Groups in Compounds

Q 8 B Structure of Functional Groups in Compounds

Q 8 B Structure of Functional Groups in Compounds

(C)

Q 8 C Structure of Functional Groups in Compounds

Q 8 C Structure of Functional Groups in Compounds

Q 8 C Structure of Functional Groups in Compounds

Answer

The functional groups present in the given compounds are:

(A) Aldehyde

Hydroxyl ,

Methoxy ,

C=C double bond

(B) Amino ,

Ketone ,

Diethylamine

(C) Nitro ,

C=C double bond

Q: 9. Which of the two: or is expected to be more stable and why?

Answer

group is an electron – withdrawing group. Hence, it shows –I effect. By withdrawing the electrons toward it, the group decreases the negative charge on the compound, thereby stabilising it. On the other hand, ethyl group is an electron3releasing group. Hence, the ethyl group shows +I effect. This increases the negative charge on the compound, thereby destabilising it. Hence, is expected to be more stable than