$A \xrightarrow{\Delta, 800^\circ C} CH_2=C=O$. Reactant '$A$' in the reaction is:

Which bond is stronger between the single bond $C-C$ of an alkane and the double bond $C=C$ of an alkene?

The product of the reaction shown is:

How many $\pi$ bonds and $\sigma$ bonds are present in the following molecule?

$A$ straight chain hydrocarbon has the molecular formula $C_8H_{10}$. The hybridisation for the carbon atoms from one end of the chain to the other are respectively $sp^3$,$sp^2$,$sp^2$,$sp^3$,$sp^2$,$sp^2$,$sp$ and $sp$. The structural formula of the hydrocarbon would be

Product $(C)$ is