What would be the product when ethen is oxidised with cold dil. `KMnO_(4)` solution ?

What happen when ethene oxidised with cold KMnO4

What would be the product when ethene is oxidised with ozone and forms ozonide which is hydrolysed in the presence of Zn and acetic acid?

What happen when propene oxidised with cold KMnO4

What happens when ethyne is treated with cold dil. KMnO_4 .

Acetylene when oxidised with alk. KMnO_(4) gives :

Toluene is oxidised by acidified KMnO_(4) to

What product is obtained when ethylbenzene is oxidised with alkaline KMnO_(4) ?