Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: R

There are no items in this cart.
Continue Shopping
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

Get extra R 350 off


how does nitrogen go to oxidation state of +5 as it does not have any  vacant 2d orbital for coming into excited state

7 years ago


Answers : (2)



Don't confuse Oxidation state with valency. Oxidation state is only a measure of how much an element is oxidized or reduced in a compound. Of course, under usual circumstances, Nitrogen will not want to get oxidised. But under special conditions, you can make Nitrogen accept or give electrons away, or at least force it to share a few electrons. In such cases, you cannot think of valency as the rule for formation of compounds. Valency rule only hold for simple compounds. (In case of Nitrogen, it doesn't hold even for simple compounds). Oxidation state +5 only means that in that compound, Nitrogen is in a highly oxidized condition. It is not impossible, there are mechanisms by which atoms like Nitrogen, Xenon, Argon etc. can form compounds.

Oxidation state is defined by IUPAC as the following:

"A measure of the degree of oxidation of an atom in a substance. It is defined as the charge an atom might be imagined to have when electrons are counted according to an agreed-upon set of rules: (1) the oxidation state of a free element (uncombined element) is zero; (2) for a simple (monatomic) ion, the oxidation state is equal to the net charge on the ion; (3) hydrogen has an oxidation state of 1 and oxygen has an oxidation state of -2 when they are present in most compounds. (Exceptions to this are that hydrogen has an oxidation state of -1 in hydrides of active metals, e.g. LiH, and oxygen has an oxidation state of -1 in peroxides, e.g. H2O2; (4) the algebraic sum of oxidation states of all atoms in a neutral molecule must be zero, while in ions the algebraic sum of the oxidation states of the constituent atoms must be equal to the charge on the ion. For example, the oxidation states of sulfur in H2S, S8 (elementary sulfur), SO2, SO3, and H2SO4 are, respectively: -2, 0, +4, +6 and +6. The higher the oxidation state of a given atom, the greater is its degree of oxidation; the lower the oxidation state, the greater is its degree of reduction."


You can get more info at


7 years ago


Oxidation number is a number that has no significance to structures. Its designated by noting the charge on the atom after theoritically giving the bonded electrons in a bond to the more electronegative element.

In NO3 - we have nitrogen forming 4 covalent bonds but the oxidation state is +5.

Oxidation number or state is a mere number and nothing more.

In chemistry, the oxidation state is an indicator of the degree of oxidation of an atom in a chemical compound. The formal oxidation state is the hypothetical charge that an atom would have if all bonds to atoms of different elements were 100% ionic. Oxidation states are typically represented by integers, which can be positive, negative, or zero. In some cases the average oxidation state of an element is a fraction, such as 8/3 for iron in magnetite (Fe3O4).

7 years ago

Post Your Answer

Other Related Questions on Inorganic Chemistry

Sir please tell me that what is henry`s rule nd how can I use it numerical question ?????????That`s I can get a secure answer???????And what is the value of Henry`s constant????
."water takes up, of gas condensed by one, two, or more additional atmospheres, a quantity which, ordinarily compressed, would be equal to twice, thrice, &c. the volume absorbed under the...
rahul kushwaha 25 days ago
@ rahul At a constant temperature, the amount of a given gas that dissolves in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium...
Umakant biswal 25 days ago
please tell thatHow shielding effect varies across periodic table? pls answer quickly.............
@ shivesh what u need to understand is that shielding or screening effect means when the shell between the nucleaus and the valence electrons are increased , in that case nucleaus is not...
Umakant biswal 2 months ago
The set representing the correct order of first ionisation potential is- K Be>Mg>Ca B>C>N Ge>Si>C
In the period the ionisation potential increases and in the group it decreases. thus, Be Mg and Ca are in group therefore othe order is correct.
Vikas TU 2 months ago
why nature favours crystalline solids ? what is meant by anisotropic and isotropic character of solids ?
Because it forms the crystal lattice which can extends in all directions. Isotrophics are those which has all the properties same in all the respective directions Anistropics are those...
Vikas TU 29 days ago
Can`t understand how to name compounds in IUPAC and common names, and how are they attached to compounds??
@ pallavi KIndly be specific , as there are so much groups in alkanes which can be attached , else u can just post a pic of organic compound and i can give u the full explanation on how...
Umakant biswal one month ago
how to balance redox reaction in acidic med. HSO 4 - +As 4 +Pb 3 O 4 ​ = PbSO 4 +H 2 AsO 4 -
1)First write down the half reactions:- a) Oxidation Half Reaction – As 4 0 is getting oxidised to As +5 . Now balance the reaction by first balancing the main atom and then by adding...
Balaji Krishnamachari 16 days ago
1)First write down the half reactions:- a) Oxidation Half Reaction – As 4 0 is getting oxidised to As +5 . Now balance the reaction by first balancing the main atom and then by adding...
Balaji Krishnamachari 16 days ago
View all Questions »

  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details
Get extra R 3,750 off

Get extra R 350 off

More Questions On Inorganic Chemistry

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details