Oxidation of an alkene X gives a diol , further oxidation gives a diketone. Which one of the following could be X ?

Oxidation of an alkene X gives a diol , further oxidation gives a dike

1.	Oxidation of an alkene X gives a diol , further oxidation gives a diketone. Which one of the following could be X ?
Answer» `(CH_3)_2C=C(CH_3)_2` `CH_3CH=C(CH_3)_2` `(CH_3)_2CHCH=CH_2` `C_6H_5CH=CHC_6H_5` SOLUTION :SINCE the diol on further oxidation forms a diketone , therefore, the diol must be monosubstituted, i.e., it must contain `2^@` alcoholic groups. Therefore, option (d) is correct. `UNDERSET"(X)"(C_6H_5CH=CHC_6H_5)underset"(BAEYER's reagent)"overset("Cold. aq. ALK." KMnO_4) to underset(("Diol contains two " 2^@ "alcoholic groups"))(C_6H_5-underset(OH)underset\|CH-underset(OH)underset\|CH-C_6H_5)overset"[O]"to underset"Diketone"(C_6H_5-undersetundersetO(\|\|)C-undersetundersetO(\|\|)C-C_6H_5)`