Question

Given below are two statements.

In the light of the above statements, choose the correct answer from the options given below:

• A. Statement I is false but Statement II is true
• B. Both Statement I and Statement II are false
• C. Statement I is true but Statement II is false
• D. Both Statement I and Statement II are true

Hint:

Key concepts: \begin{itemize} \item Dipole moment depends on charge magnitude and separation distance \item Conjugation affects both electronic distribution and bond lengths \item Partial double bond character decreases bond length \end{itemize}

Answer 1

The Correct Option is C

1. Analysis of Statement I:

• For \({CH_3-CH=CH-CH=O}\): $\mu = q \times d$
• Conjugated system creates greater charge separation
• More distance between charges than in saturated compound

Therefore, greater dipole moment

2. Analysis of Statement II:

• In \({CH_3-CH=CH-CH=O}\), $C_1-C_2$ has partial double bond character
• Double bond character means shorter bond length
• Compared to pure single bond in \chemfig{CH_3-CH_2-CH_2-CH=O}
  Statement II is FALSE
  (actual bond length is shorter)