Bayer's reagent used to detect olefinic double bond is

$A$ hydrocarbon with molecular formula $C_6H_{10}$ absorbs only one molecule of $H_2$ upon hydrogenation. Ozonolysis of the hydrocarbon yields $OHC-CH_2-CH_2-CH_2-CH_2-CHO$. The hydrocarbon is:

The alkene that gives only acetone upon ozonolysis is .......

Find the stability order of the following compounds:

The formation of isopropyl chloride from the reaction between propene and $HCl$ is based on which of the following?

The reaction of $CH_3-CH=C(CH_3)-CH=CH_2$ with $(1) \ O_3$ followed by $(2) \ H_2O, Zn$ gives which products?