Question

oxidation state of MnO2​

Answer 1

Answer:

oxygen always has an oxidation number of -2 when paired with metals such as manganese. This requires manganese to take a charge of +4, so the MnO2 compound has a neutral total charge. The manganese ion also exhibits other oxidation numbers, such as +2 and +7.

Answer 2

Answer: The oxidation state of manganese and oxygen atoms in the given compound is +4 and -2 respectively.

Explanation:

We are given:

A chemical compound having chemical formula $MnO_2$

Oxidation state is defined as the number which is assigned to the element when it gains or loose electrons.

If an element gains electron, it will attain a negative oxidation state and if an element looses electrons, it will attain a positive oxidation state.

We take the oxidation state of manganese atom be 'x'.

Oxidation state of oxygen atom = -2

Evaluating the oxidation state of manganese atom:

$x+2(-2)=0\\\\x=+4$

Hence, the oxidation state of manganese and oxygen atoms in the given compound is +4 and -2 respectively.