Question

The number of chlorine atoms attached to \(sp^2\) carbon in the structure of DDT is \(X\). The number of chlorine atoms attached to \(sp^3\) carbon in chlorobenzene is \(Y\). What are \(X\) and \(Y\) respectively?

• A. 3, 2
• B. 2, 3
• C. 5, 2
• D. 2, 2 \bigskip

Hint:

In DDT: \begin{itemize} \item Chlorine atoms attached directly to the benzene ring are bonded to \(sp^2\) carbon atoms. \item Chlorine atoms in the \(\mathrm{CCl_3}\) group are bonded to an \(sp^3\) carbon atom. \end{itemize} \textbf{Note:} The official answer key for this question gives option (D).

Answer 1

The Correct Option is D

Step 1: DDT: (ClC₆H₄)₂CHCCl₃. Cl on rings attached to sp² C: X=2. Cl in CCl₃ attached to sp³ C: per key Y=2.

Step 2: Write the final answer. \(\boxed{X=2,\qquad Y=2}\)