Oxidation Number and Rules for Assigning Oxidation Numbers
Chemistry ⇒ Redox Reactions and Electrochemistry
Oxidation Number and Rules for Assigning Oxidation Numbers starts at 10 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Oxidation Number and Rules for Assigning Oxidation Numbers.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 12
Assign the oxidation number to chlorine in Cl2O7.
Assign the oxidation number to each atom in the compound C2H5OH (ethanol).
Assign the oxidation number to each atom in the compound H2O2.
Assign the oxidation number to each atom in the compound HNO2.
Assign the oxidation number to phosphorus in PO43-.
Assign the oxidation number to sulfur in H2SO4.
Explain why the oxidation number of oxygen in OF2 is +2.
In the context of redox reactions, explain the significance of oxidation numbers.
In which of the following compounds does nitrogen have the highest oxidation number?
(1) NH3
(2) N2O
(3) NO2
(4) HNO3
Which of the following elements always has an oxidation number of zero in its elemental form?
(1) O2
(2) H2O
(3) NaCl
(4) CO2
Which of the following elements can have variable oxidation numbers?
(1) Sodium
(2) Iron
(3) Fluorine
(4) Magnesium
Which of the following has an oxidation number of -1 for oxygen?
(1) H2O
(2) H2O2
(3) O3
(4) CO2
Fill in the blank: The oxidation number of halogens (except when combined with oxygen or fluorine) is usually _______.
Fill in the blank: The sum of the oxidation numbers in a polyatomic ion is equal to its _______.
The oxidation number of alkali metals (Group 1) in their compounds is always _______.
The oxidation number of hydrogen is usually _______ when bonded to non-metals.
True or False: The oxidation number of an atom can be positive, negative, or zero.
True or False: The oxidation number of an atom in a diatomic molecule like N2 is zero.
True or False: The oxidation number of an atom in a monoatomic ion is equal to the charge of the ion.
True or False: The oxidation number of fluorine is always -1 in its compounds.
