Front

What is the oxidation number of carbon (C) in methane (CH₄)?

Back

-4

Front

What is the sum of all oxidation numbers in a neutral compound?

Back

0

Front

What is the oxidation number of iron (Fe) in iron(II) oxide (FeO)?

Back

+2

Front

Which of the following is NOT an ionic compound: NaCl, NH₃, Fe₂O₃, HCl?

Back

NH₃

Front

What is the oxidation number of oxygen (O) in carbon dioxide (CO₂)?

Back

-2

Front

Define oxidation number.

Back

The oxidation number is a measure of the degree of oxidation of an atom in a substance, indicating the number of electrons lost or gained.

Front

What is the oxidation number of hydrogen (H) in most compounds?

Back

+1

Front

What is the oxidation number of oxygen (O) in peroxides?

Back

-1

Front

What is the oxidation number of sodium (Na) in sodium chloride (NaCl)?

Back

+1

Front

What is the oxidation number of chlorine (Cl) in NaCl?

Back

-1