The $IUPAC$ name of $C_6H_5COCl$ is

The $IUPAC$ name for the compound is

Calculate the double bond equivalent $(DBE)$ for the following compound.

Match the structures in Column-$I$ with their $\text{IUPAC}$ names in Column-$II$.

Column-$I$ (Structure)	Column-$II$ ($\text{IUPAC}$ Name)
$A$. $3-$bromocyclohexanol	$1$. $2,5$-dimethylhexane-$1,3$-diol
$B$. $CH_3-C(Br)=C(CH_3)-CH_2OH$	$2$. $3$-bromocyclohexanol
$C$. $CH_3-CH(CH_3)-CH_2-CH(OH)-CH(CH_2OH)-CH_3$	$3$. hex-$1$-en-$3$-ol
$D$. $CH_2=CH-CH(OH)-CH_2-CH_2-CH_3$	$4$. $2$-bromo-$3$-methylbut-$2$-en-$1$-ol

Write the $IUPAC$ and common names of the following compounds:
$(i)$ $HO-CH_2-CH_2-CH_2-OH$
$(ii)$ $HO-CH_2-CH(OH)-CH_2-OH$
$(iii)$ $OHC-CHO$
$(iv)$ $CH_3COOCH_3$
$(v)$ $CH_3COOCH_2CH_3$
$(vi)$ $CHCl_2-CCl_3$

What is the $IUPAC$ name of the following compound?