The number of chlorine $(\mathrm{Cl})$ atoms in the structure of DDT molecule is
The major product in Reimer-Tiemann reaction is $X$. The reactants are $Y$ and $Z, X, Y$ and $Z$ are respectively
$$ \text { Toluene } \xrightarrow[\text { (ii) } \mathrm{H}_3 \mathrm{O}^{+}]{\text {(i) } \mathrm{CrO}_2 \mathrm{Cl}_2 / \mathrm{CS}_2} X \xrightarrow{\text { Conc. } \mathrm{NaOH}} Y+Z $$
The correct statements about $Y$ and $Z$ are
A. $Y$ is a secondary alcohol.
B. $Y$ is the reduction product of $X$.
C. $Z$ on heating with sodalime gives benzene.
D. $Y$ does not give $\mathrm{H}_2$ gas with Na metal.
$$ \text { Identify the product ' } P \text { ' in the given reaction sequence. } $$

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