More practice questions

3. Q3. Give the IUPAC name of H₂N–CH₂CH₂CH₂CH₂–NH₂.

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   Butane-1,4-diamine: a four-carbon chain with –NH₂ on C1 and C4, “di” before “amine” and the “e” of butane kept (reasoned from NCERT page 260).

4. Q4. Name (CH₃)₂NCH₂CH₂CH₃ in the IUPAC system and classify it.

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   N,N-Dimethylpropan-1-amine, a tertiary amine: the longest chain on nitrogen, propyl, is the parent, and the two methyl groups on nitrogen take the locant N (reasoned from NCERT pages 260–261).

5. Q5. Give the common and IUPAC names of m-BrC₆H₄NH₂. (Compare NCERT Exercise 9.1 (vii), page 278.)

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   m-Bromoaniline; 3-bromobenzenamine, or 3-bromoaniline, built like NCERT’s p-bromoaniline, 4-bromobenzenamine (reasoned from NCERT Table 9.1, page 261).

6. Q6. Write the structure of N-ethyl-N-methylpropan-1-amine.

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   CH₃CH₂CH₂–N(CH₃)–CH₂CH₃: a propyl chain on nitrogen, with an ethyl and a methyl group also on nitrogen, named in alphabetical order (reasoned from NCERT pages 260–261).