8 Most VSAQ’s of Organic Chemistry Some Basic Principles and Techniques Chapter in Inter 1st Year Chemistry (TS/AP)

2 Marks

VSAQ-1 : Write IUPAC names of the following:

IUPAC Names of Compounds

  1. 2,2,4,4-Tetramethylpentane: The IUPAC name for 2,2,4,4-Tetramethylpentane is 2,2,4,4-tetramethylbutane.
  2. 2-Pentanol: The IUPAC name for 2-Pentanol is 2-Pentanol itself.

VSAQ-2 : Write IUPAC names of the following:

IUPAC Names of Compounds

  1. 2,2,3-Trimethylpentane: The IUPAC name for 2,2,3-Trimethylpentane is indeed 2,2,3-trimethylpentane.
  2. 4,4-Dimethylpentanoic Acid: The IUPAC name for this compound is 4,4-dimethylpentanoic acid.

VSAQ-3 : Write IUPAC names of the following compounds:
a.CH2 = CH – C = C – CH3
b.CH3CH = C | CH32

IUPAC Names of Compounds

a. CH2 = CH – C = C – CH3: The IUPAC name for this compound is indeed 1,3-butadiene.

b. CH3 CH = C | CH3 |_2: The IUPAC name for this compound is 2-methyl-2-butene.

VSAQ-4 : Write IUPAC names of the following:
a.CH3 – CH2 – CH2 – CH =CH2
b.CH3 – CH2 – C – CH3

IUPAC Names of Compounds

a. CH3 – CH2 – CH2 – CH = CH2: The IUPAC name for this compound is 1-pentene.

b. CH3 – CH2 – C – CH3: The IUPAC name for this compound is 2-butanone.

VSAQ-5 : Write IUPAC names of the following compounds:

IUPAC Names of Compounds

  1. 3-Pentanone: The name “3-Pentanone” is already in the correct IUPAC format.
  2. 1,3-Butadiene: The name “1,3-Butadiene” is also in the correct IUPAC format.

VSAQ-6 : Write IUPAC names of the following compounds:

IUPAC Names of Compounds

  1. 3-Ethyl-2-methylpentane: The name “3-Ethyl-2-methylpentane” is already in the correct IUPAC format.
  2. 3-Ethyl-4-methylhexane: The name “3-Ethyl-4-methylhexane” is also in the correct IUPAC format.

VSAQ-7 : Write the structural formulae of the following compounds:
1.3,4,4,5-Tetramethyl heptane
2.2-Methyl-1-butene

Structural Formulas of Compounds

  1. 3,4,4,5-Tetramethylheptane: CH3 – CH(CH3)2 – CH(CH3)2 – CH(CH3)2 – CH2 – CH(CH3)2 – CH3
  2. 2-Methyl-1-butene: CH3 – CH2 – C(CH3)2 – CH2 – CH3

VSAQ-8 : Write the structural formulae of the following compounds:
1. Trichloroethanoic acid
2. Neo pentane
3. P- nitrobenzaldehyde

Structural Formulas of Compounds

  1. Trichloroethanoic Acid: Cl – C(=O)OH (The “Cl” represents chlorine atoms, and “C(=O)OH” is the carboxylic acid group.)
  2. Neopentane: (CH3)4C (This represents four methyl groups attached to a central carbon atom.)
  3. P-Nitrobenzaldehyde: This compound has a nitro group (NO2) and an aldehyde group (C=O) attached to a benzene ring. The “p-” indicates that the nitro group is in the para position, which means it is opposite to the aldehyde group on the benzene ring. The structural formula is more complex and is represented as follows:
    O | C || NO₂ | C || H