Product $(P)$ is

An alkene $X$ on ozonolysis gives a mixture of simplest ketone $(Y)$ and $3-$Pentanone. The $IUPAC$ name of the alkene $X$ is

Bromination of $(E)-2$-butenedioic acid gives:

In which of the following,addition of $HBr$ does not take place against Markownikoff's rule,or for which is the Anti-Markownikoff addition of $HBr$ not observed?

How many moles of $BH_3$ are needed to react completely with $2 \ mol$ of $1$-pentene in a hydroboration-oxidation reaction?

In the reaction $CH_3CH_2CH_2Br$ $\xrightarrow{aq. NaOH} (X)$ $\xrightarrow{Al_2O_3, \text{Heat}} (Y)$ $\xrightarrow{HOCl} (Z)$,what is $Z$?