Advertisements
Advertisements
प्रश्न
Explain how does nitrogen exhibit anomalous behaviour amongst group 15 elements.
Advertisements
उत्तर
Nitrogen shows anomalous behaviour as follows:-
- Nitrogen is a gas, whereas the other members of the family are solids.
- Nitrogen is diatomic, while the other elements such as phosphorus and arsenic form tetra-atomic molecules (P4, As4).
- Nitrogen forms five types of oxides (N2O, NO, N2O3, N2O4 and N2O5), while the other members form two types of oxides—trioxides and pentoxides.
- Hydrides of nitrogen consist of H-bonding, which is absent in members of other elements.
- Nitrogen does not show penta-covalency because of the absence of d-orbitals, but all other elements show penta-covalency.
- Nitrogen dose not form complexes because of the absence of d-orbitals, while the other elements show complex formation (e.g. [PCl6]-, [AsCl6]-).
- The hydride of nitrogen (NH3) is highly basic in nature, whereas the hydrides of other elements are slightly basic.
APPEARS IN
संबंधित प्रश्न
The element that does NOT exhibit allotropy is
- As
- Sb
- Bi
- N
Considering the parameters such as bond dissociation enthalpy, electron gain enthalpy and hydration enthalpy, compare the oxidising power of F2 and Cl2.
Why does R3P=O exist but R3N=O does not (R = alkyl group)?
Nitrogen exists as diatomic molecule and phosphorus as P4. Why?
Write the structural difference between white phosphorus and red phosphorus.
Account for the following
The enthalpy of atomisation is lowest for Zn in 3d series of the transition elements.
Account for the following
Bi(V) is a stronger oxidizing agent than Sb(V).
Elements having +5 oxidation state is ____________.
The most common oxidation states of nitrogen are ____________.
The correct order of solubility in water for He, Ne, Ar, Kr, Xe is:
With respect to protonic acids, which of the following statement is correct?
Elements of group-15 form compounds in +5 oxidation state. However, bismuth forms only one well-characterised compound in +5 oxidation state. The compound is ______.
Which of the following is the strongest reducing agent?
The correct order of increasing oxidising power is:
Among the following, which one is a wrong statement.
Covalency of nitrogen is restricted to ______.
Which of the following has highest ionisation enthalpy?
If chlorine gas is passed through hot NaOH solution, two changes are observed in the oxidation number of chlorine during the reaction. These are :
(i) 0 to +5
(ii) 0 to +3
(iii) 0 to –1
(iv) 0 to +1
Match the species given in Column I with the shape given in Column II and mark the correct option.
| Column I | Column II |
| (A) \[\ce{SF4}\] | (1) Tetrahedral |
| (B) \[\ce{BrF2}\] | (2) Pyramidal |
| (C) \[\ce{BrO^{-}3}\] | (3) Sea-saw shaped |
| (D) \[\ce{NH^{+}4}\] | (4) Bent T-shaped |
In which of the following compounds, metal is in lowest oxidation state?
The enthalpy change of a reaction does not depends upon?
What is the oxidation state of nitrogen atom in hydrazine, N2H4?
In which of the following compounds the metal is in lowest oxidation state?
The electronic configuration of Cu (atomic number 29) is
The elements with atomic numbers 9, 17, 35, 53 and 85 belong to
Among the following, identify the species with an atom in +6 oxidation state.
In NH3 and PH3 the common is:-
The correct order of increase acidic strength of CIOH(1), BrOH (II) and lOH (iii) is.
Chemical nature of the nitrogen oxide compound obtained from a reaction of concentrated nitric acid and P4O10 (in 4 : 1 ratio) is ______.
