what is the diff. betweenoxidationbetween potassium dichromate a ndalkaline potassim permanganate of alkenes?

Alkenes will give two different types of product with the KMnO₄. When cold KMnO_​4 is used, alkene gives glycols (1,2-diols) and when hot KMnO₄ is used, cleavage of bonds take place result into the formation of carboxylic acids. K₂Cr₂O₇ also result into the cleavage of bonds and hence carboxylic acids are formed.