The gas used for artificial ripening of fruits is .......... .

An alkene $(A)$ $C_{16}H_{16}$ on ozonolysis gives only one product $(B)$ $C_8H_8O$. $(B)$ can also be obtained by the hydrolysis of the product obtained from the reaction between cyanobenzene and $CH_3MgBr$. $(A)$ shows geometrical isomerism and decolourises $Br_2$ water. $(B)$ on treatment with $SeO_2$ produces $(C)$. Which statement is not correct about $(A)$?

Conjugated double bond is present in

$HCl$ does not follow the anti-Markovnikov rule because...

With anhydrous zinc chloride,ethylene glycol gives:

How many single and double bonds are present in ethene $(C_2H_4)$? Where are they located?