`a.` Write the products of the reductive and oxidative ozonolyses of mesitylene.
`b.` Give the structure of the alkene `(C_(4)H_(8))` which when treated with dil. `H_(2)SO_(4)` give `C_(4)H_(10)O`, which is non`-` resolvable.
`c.` Give the structure of the alkane `(C_(4)H_(8))` which adds `HBr` in the presence and absence of peroxide to give the same product `C_(4)H_(9)Br.`
`d.` Arrange the following in the decreasing order of their reactivity towards alkenes `:`
`i. HCI,ii.HBr, iii. HI,iv. HF.`

Explanation

`a.`
`b.`
Hence the answer is `(III)` isobutene or `2-` methyl propene.
`c.` Write the possible isomeric structures of `C_(4)H_(8):`

But `2-`ene is a symmetrical compound and gives the same compound in the presence or absence of peroxide, while compounds `(I)` and `(III)` are unsymmetrical compounds and will yield different products.
`d.` `HFgtHCIgtHBrgtHI`.