The semicarbazone of cyclobutanone is represented as:

$3-\text{Hydroxybutanal}$ is formed when $X$ reacts with $Y$ in dilute $Z$ solution. What are $X, Y$ and $Z$? $(X, Y, Z)$

Which of the following can be used to convert benzophenone into benzene?

What are $X$ and $Y$ in the following reaction sequence?
$Propene$ $\xrightarrow{HBr} A$ $\xrightarrow[Dry \ ether]{Mg} B$ $\xrightarrow[2. H_3O^{+}]{1. X} Y$

Which of the following reactions is preferentially used to prepare the corresponding alkanes from alkanones?

Following compounds are given:
$(i) CH_3-CH_2-OH$
$(ii) CH_3-CO-CH_3$
$(iii) CH_3-CH(OH)-CH_3$
$(iv) CH_3-OH$
Which of the above compound$(s)$,on being warmed with iodine solution and $NaOH$,will give iodoform?