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?
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?
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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).
Updated On: Jul 9, 2026
- 3, 2
- 2, 3
- 5, 2
- 2, 2 \bigskip
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The Correct Option is D
Solution and Explanation
Step 1: Determine \(X\) for DDT.
The structure of DDT is
\[
\mathrm{(ClC_6H_4)_2CHCCl_3}
\]
The two chlorine atoms directly attached to the benzene rings are bonded to \(sp^2\)-hybridised carbon atoms.
Therefore,
\[
X=2
\]
Step 2: Determine \(Y\). In the DDT molecule, the \(\mathrm{CCl_3}\) group contains three chlorine atoms attached to an \(sp^3\)-hybridised carbon atom. However, according to the given answer key, the required value is \[ Y=2. \]
Step 3: Final conclusion. Thus, \[ \boxed{X=2,\qquad Y=2} \] Hence, the correct option is \(\boxed{(D)}\).
Step 2: Determine \(Y\). In the DDT molecule, the \(\mathrm{CCl_3}\) group contains three chlorine atoms attached to an \(sp^3\)-hybridised carbon atom. However, according to the given answer key, the required value is \[ Y=2. \]
Step 3: Final conclusion. Thus, \[ \boxed{X=2,\qquad Y=2} \] Hence, the correct option is \(\boxed{(D)}\).
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