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प्रश्न
Discuss the trends in chemical reactivity of group 15 elements.
उत्तर
General trends in chemical properties of group − 15
(i) Reactivity towards hydrogen:
The elements of group 15 react with hydrogen to form hydrides of type EH3, where E = N, P, As, Sb, or Bi. The stability of hydrides decreases on moving down from NH3 to BiH3.
(ii) Reactivity towards oxygen:
The elements of group 15 form two types of oxides: E2O3 and E2O5, where E = N, P, As, Sb, or Bi. The oxide with the element in the higher oxidation state is more acidic than the other. However, the acidic character decreases on moving down a group.
(iii) Reactivity towards halogens:
The group 15 elements react with halogens to form two series of salts: EX3 and EX5. However, nitrogen does not form NX5 as it lacks the d-orbital. All trihalides (except NX3) are stable.
(iv) Reactivity towards metals:
The group 15 elements react with metals to form binary compounds in which metals exhibit −3 oxidation states.
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संबंधित प्रश्न
Why is BiH3 the strongest reducing agent amongst all the hydrides of Group 15 elements?
Nitrogen exists as diatomic molecule and phosphorus as P4. Why?
Account for the following
Bi(V) is a stronger oxidizing agent than Sb(V).
Give a reason for the following:
E° value for (Mn2+|Mn) is negative whereas for (Cu2+|Cu) is positive.
Elements having +5 oxidation state is ____________.
[Ar]3d104s24p3 is the electronic configuration of ____________.
Collectively the elements of group 15 are called:
Which one of the following elements is most metallic?
Which of the following group 15 elements forms metallic bonds in an elemental state?
The p-block element of group 15 that forms predominantly basic oxide is _____________.
Which of the following element will form acidic oxides of type E2O3?
The ion or group detected by K2[HgI4] is ____________.
The correct order of increasing oxidising power is:
Which of the following orders are correct as per the properties mentioned against each?
| (i) | \[\ce{As2O3 < SiO2 < P2O3 < SO2}\] | Acid strength. |
| (ii) | \[\ce{AsH3 < PH3 < NH3}\] | Enthalpy of vapourisation. |
| (iii) | \[\ce{S < O < Cl < F}\] | More negative electron gain enthalpy. |
| (iv) | \[\ce{H2O > H2S > H2Se > H2Te}\] | Thermal stability. |
The enthalpy change of a reaction does not depends upon?
Hess's law is used to calculate:
The elements which are characterized by the outer electronic configuration ns1 to ns2 np6 are collectively called
In a regular octahedral molecule mx6, the number of X – M – X bouds at 180° are:-
In NH3 and PH3 the common is:-
When a colourless gas is passed through bromine water it decolorise, The gas is:-
