The major product$(s)$ formed in the following reaction sequence is (are):

The Diels-Alder reaction will not take place with which of the following reactants?

$KO_2C-CH_2-CH_2-CO_2K \xrightarrow{\text{electrolysis}} (A) \text{ (major)}$ (Kolbe electrolysis method). The product $(A)$ of the reaction is:

When propene reacts with $HCl$ in the presence of peroxide,the product is

$A$ hydrocarbon $C_6H_{10}$ absorbs only one molecule of $H_2$ upon catalytic hydrogenation. Upon ozonolysis,it yields $CHO(CH_2)_4CHO$. What is the hydrocarbon?

In the given reaction,$(x)$ will be: