Identify the reagent$(s)$ $A$ and condition$(s)$ for the reaction shown in the image:

Which alkene is formed from the following pair of alkylidene phosphorane and carbonyl compound?

Molar mass of the hydrocarbon $(X)$ which on ozonolysis consumes one mole of $O_3$ per mole of $(X)$ and gives one mole each of ethanal and propanone is $...... g\ mol^{-1}$ (Molar mass of $C: 12\ g\ mol^{-1}, H: 1\ g\ mol^{-1}$)

$A$ hydrocarbon reacts with hypochlorous acid to give $1-$chloro$-2-$hydroxyethane. The hydrocarbon is

The reaction $CH_2 = CH_2 + H_2 \xrightarrow[{250 - 300 \, ^oC}]{{Ni}} CH_3 - CH_3$ is known as:

Olefins can be hydrogenated by