318325 Assertion :
\(-\mathrm{C}_{2} \mathrm{H}_{5}\) is an \({\text{o / p}}\)-directing group.
Reason :
The groups which direct the incoming group to ortho and para positions are called \({\text{o / p}}\) -directing groups.

318326 Assertion :
Nitrobenzene does not undergo
Friedel Crafts reaction.
Reason :
Nitrobenzene is a \({\text{m}}\) -director.

318327 Which order is correct for the decreasing reactivity for ring monobromination of the following compounds?
\[\begin{gathered}
{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}{\text{C}}{{\text{H}}_{\text{3}}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}{\text{COOH,}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {{\text{C}}_{\text{6}}}{{\text{H}}_{\text{6}}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}{\text{N}}{{\text{O}}_{\text{2}}}{\text{?}} \hfill \\
{\mkern 1mu} {\text{I}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,\,\,\,\,\,\,{\text{II}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,\,\,\,\,\,{\text{III}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,{\text{IV}} \hfill \\
\end{gathered} \]

318328 The compound \({{\text{C}}_{\text{7}}}{{\text{H}}_{\text{8}}}\) undergoes the following reactions :
\({{\text{C}}_{\text{7}}}{{\text{H}}_{\text{8}}}\xrightarrow{{{\text{3C}}{{\text{l}}_{\text{2}}}{\text{/}}\Delta }}{\text{A}}\xrightarrow{{{\text{B}}{{\text{r}}_{\text{2}}}{\text{/Fe}}}}{\text{B}}\xrightarrow{{{\text{Zn/HCl}}}}{\text{C}}\)

318325 Assertion :
\(-\mathrm{C}_{2} \mathrm{H}_{5}\) is an \({\text{o / p}}\)-directing group.
Reason :
The groups which direct the incoming group to ortho and para positions are called \({\text{o / p}}\) -directing groups.

318326 Assertion :
Nitrobenzene does not undergo
Friedel Crafts reaction.
Reason :
Nitrobenzene is a \({\text{m}}\) -director.

318327 Which order is correct for the decreasing reactivity for ring monobromination of the following compounds?
\[\begin{gathered}
{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}{\text{C}}{{\text{H}}_{\text{3}}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}{\text{COOH,}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {{\text{C}}_{\text{6}}}{{\text{H}}_{\text{6}}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}{\text{N}}{{\text{O}}_{\text{2}}}{\text{?}} \hfill \\
{\mkern 1mu} {\text{I}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,\,\,\,\,\,\,{\text{II}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,\,\,\,\,\,{\text{III}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,{\text{IV}} \hfill \\
\end{gathered} \]

318328 The compound \({{\text{C}}_{\text{7}}}{{\text{H}}_{\text{8}}}\) undergoes the following reactions :
\({{\text{C}}_{\text{7}}}{{\text{H}}_{\text{8}}}\xrightarrow{{{\text{3C}}{{\text{l}}_{\text{2}}}{\text{/}}\Delta }}{\text{A}}\xrightarrow{{{\text{B}}{{\text{r}}_{\text{2}}}{\text{/Fe}}}}{\text{B}}\xrightarrow{{{\text{Zn/HCl}}}}{\text{C}}\)

318325 Assertion :
\(-\mathrm{C}_{2} \mathrm{H}_{5}\) is an \({\text{o / p}}\)-directing group.
Reason :
The groups which direct the incoming group to ortho and para positions are called \({\text{o / p}}\) -directing groups.

318326 Assertion :
Nitrobenzene does not undergo
Friedel Crafts reaction.
Reason :
Nitrobenzene is a \({\text{m}}\) -director.

318327 Which order is correct for the decreasing reactivity for ring monobromination of the following compounds?
\[\begin{gathered}
{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}{\text{C}}{{\text{H}}_{\text{3}}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}{\text{COOH,}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {{\text{C}}_{\text{6}}}{{\text{H}}_{\text{6}}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}{\text{N}}{{\text{O}}_{\text{2}}}{\text{?}} \hfill \\
{\mkern 1mu} {\text{I}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,\,\,\,\,\,\,{\text{II}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,\,\,\,\,\,{\text{III}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,{\text{IV}} \hfill \\
\end{gathered} \]

318328 The compound \({{\text{C}}_{\text{7}}}{{\text{H}}_{\text{8}}}\) undergoes the following reactions :
\({{\text{C}}_{\text{7}}}{{\text{H}}_{\text{8}}}\xrightarrow{{{\text{3C}}{{\text{l}}_{\text{2}}}{\text{/}}\Delta }}{\text{A}}\xrightarrow{{{\text{B}}{{\text{r}}_{\text{2}}}{\text{/Fe}}}}{\text{B}}\xrightarrow{{{\text{Zn/HCl}}}}{\text{C}}\)

318325 Assertion :
\(-\mathrm{C}_{2} \mathrm{H}_{5}\) is an \({\text{o / p}}\)-directing group.
Reason :
The groups which direct the incoming group to ortho and para positions are called \({\text{o / p}}\) -directing groups.

318326 Assertion :
Nitrobenzene does not undergo
Friedel Crafts reaction.
Reason :
Nitrobenzene is a \({\text{m}}\) -director.

318327 Which order is correct for the decreasing reactivity for ring monobromination of the following compounds?
\[\begin{gathered}
{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}{\text{C}}{{\text{H}}_{\text{3}}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}{\text{COOH,}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {{\text{C}}_{\text{6}}}{{\text{H}}_{\text{6}}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}{\text{N}}{{\text{O}}_{\text{2}}}{\text{?}} \hfill \\
{\mkern 1mu} {\text{I}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,\,\,\,\,\,\,{\text{II}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,\,\,\,\,\,{\text{III}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,{\text{IV}} \hfill \\
\end{gathered} \]

318328 The compound \({{\text{C}}_{\text{7}}}{{\text{H}}_{\text{8}}}\) undergoes the following reactions :
\({{\text{C}}_{\text{7}}}{{\text{H}}_{\text{8}}}\xrightarrow{{{\text{3C}}{{\text{l}}_{\text{2}}}{\text{/}}\Delta }}{\text{A}}\xrightarrow{{{\text{B}}{{\text{r}}_{\text{2}}}{\text{/Fe}}}}{\text{B}}\xrightarrow{{{\text{Zn/HCl}}}}{\text{C}}\)