Suggest the suitable reagens for the following conversions:

Explanation

(a) The oxidation of secondary alcohol can be carried by either a mixture of `K_(2)Cr_(2)O_(7)` and conc. `H_(2)SO_(4)` or by `CrO_(3)` dissolved in glacial acetic acid.
(b) Since alcohol is tertiary in nature, it is not oxidised but dehydrated to cyclopentene with reagents like conc `HNO_(3)` or alkaline potassium permagamate.......