Ozonolysis of an organic compound gives formaldehyde as one of the products. This indicates the presence of:

The reaction of an alkene $X$ with bromine produces a compound $Y$,which has $22.22 \% \ C$,$3.71 \% \ H$ and $74.07 \% \ Br$. The ozonolysis of alkene $X$ gives only one product. The alkene $X$ is,
[Given,atomic mass of $C = 12$; $H = 1$; $Br = 80$ ]

Which of the following has the lowest heat of hydrogenation per mole?

Identify the product formed when $cis-but-2-ene$ reacts with $Baeyer's$ reagent (cold,dilute alkaline $KMnO_4$ solution).

The major product of the following reaction is:

Ozonolysis of one mole of a symmetrical alkene yields two moles of an aldehyde with a molar mass of $44 \ u$. Identify the alkene.