Which of the following vapours passed over heated copper to form acetone?

Which sequence of steps describes the best synthesis of $2-$phenylpropene?

Lucas test is used for the determination of

Widespread deaths due to liquor poisoning occur due to

Identify the reagents $X, Y, Z$ for the following dehydration reactions of alcohols:
$CH_3-CH_2-OH \xrightarrow{X} CH_2=CH_2 + H_2O$
$CH_3-CH(OH)-CH_3 \xrightarrow{Y} CH_3-CH=CH_2 + H_2O$
$(CH_3)_3C-OH \xrightarrow{Z} (CH_3)_2C=CH_2 + H_2O$

Arrange the following compounds in decreasing order of their boiling point $(BP)$:
$CH_3CHO$ $(I)$,$CH_3CH_2OH$ $(II)$
$CH_3OCH_3$ $(III)$,$CH_3CH_2CH_3$ $(IV)$