My teacher told me that elements get oxidised when:
1)There is a loss of electron
2) There is an addition of oxygen
3)There is a loss of hydrogen
And that they get reduced when:
1)There is a gain of electron
2) There is a loss of oxygen
3)There is an addition of hydrogen
Now I don't understand these things:
1) Most elements will lose an electron (and get oxidised) on the addition of oxygen due to its high electronegativity. But what about OF2? In this case shouldn't oxygen get oxidised and fluorine get reduced due to the higher electronegativity of fluorine? (I know its a covalent bond but I am talking in terms of on which side the electron will get attracted)
2) How does loss of hydrogen (or addition of hydrogen) oxidise (or reduce) an element? Like there are elements that have higher electronegativity than hydrogen then how will they get oxidised on the loss of hydrogen? They should get reduced because of the gain of an electron from hydrogen, right?