Which compound has -0.5 oxidation state of oxygen

1.	Which compound has -0.5 oxidation state of oxygen
Answer» Answer: This is an electrically neutral compound, so the SUM of the oxidation states of the hydrogen and oxygen must be ZERO. ... Determining oxidation states. Element Usual oxidation state Exceptions Oxygen Usually -2 Peroxides and F2O (see below) Hydrogen Usually +1 Metal hydrides (-1) (see below

Answer»

Answer:

This is an electrically neutral compound, so the SUM of the oxidation states of the hydrogen and oxygen must be ZERO.

...

Determining oxidation states.

Element Usual oxidation state Exceptions

Oxygen Usually -2 Peroxides and F2O (see below)

Hydrogen Usually +1 Metal hydrides (-1) (see below

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