
- A$4$-Bromo-$3$-cyanophenol
- ✓$2$-Bromo-$5$-hydroxybenzonitrile
- C$2$-Cyano-$4$-hydroxybromobenzene
- D$6$-Bromo-$3$-hydroxybenzonitrile

The $IUPAC$ name of the given compound is $2$-Bromo-$5$-hydroxy benzo nitrile.
Cyanide group is given the highest priority.
Hence, it is written as suffix as in benzo nitrile. The numbering is done in such a way that substituents get lowest locants.
The names of substituents are written in alphabetical order.
Option $B$ is correct.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
[Atomic masses $\mathrm{Cu}: 63.54\, \mathrm{u}, \mathrm{S}: 32\, \mathrm{u}, \mathrm{O}: 16 \,\mathrm{u}, \mathrm{H}: 1\, \mathrm{u}]$
$(A)$ $T _1= T _2$ $(B)$ $T _3> T _1$
$(C)$ $W _{\text {isothermal }} > W _{\text {adiabatic }}$ $(D)$ $\Delta U_{\text {isothermal }}>\Delta U_{\text {adiabatic }}$
the product $A$ is
$2NO + 2H_2 \longrightarrow N_2 + 2H_2O$
has following mechanism
Step $-I$ : $2NO \longrightarrow N_2O_2$
Step $-II$ : $N_2O_2 + H_2 \longrightarrow N_2O + H_2O$
Step $-III$ : $N_2O + H_2 \longrightarrow N_2 + H_2O$
Which of the following substance is a reaction intermediate
select the correct statement