$Ph-CH_2-CH=CH-CH_3$ $\xrightarrow[(ii) \text{ Alc. KOH}]{(i) \text{ } Br_2}$ ?

$\underset{(\text{Calcium carbide})}{CaC_2}$ $\xrightarrow{H_2O} (A)$ $\xrightarrow{\text{Red hot Cu tube}} (B)$. The product $(B)$ of the reaction is:

Which of the following reactions will yield $2, 2-$dibromopropane?

The reaction sequence is: $Br-(CH_2)_{12}-C\equiv CH$ $\xrightarrow{NaNH_2} (A)$ $\xrightarrow[Catalyst]{Lindlar} (B)$. The product $(B)$ is:

Identify the correct order of acidic strength for the following hydrocarbons:

Which is the most suitable reagent among the following to distinguish compound $(iii)$ from the rest of the compounds?
$(i)$ $CH_3-C\equiv C-CH_3$
$(ii)$ $CH_3-CH_2-CH_2-CH_3$
$(iii)$ $CH_3-CH_2-C\equiv CH$
$(iv)$ $CH_3-CH=CH_2$