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  • Select the correct statement about elements of group 15th         Option: 1 The order of stability of ox

Select the correct statement about elements of group 15th         

Option: 1

The order of stability of oxidation state for  +3\; is\; Bi^{+3}> Sb^{+3}> As^{+3}   and for   +5\; is\; Bi^{+5}< Sb^{+5}< As^{+5}

 


Option: 2

In case of nitrogen, all oxidation states from +1 to +4 tend to disproportionate in acid solution.


Option: 3

There is a considerable increase in covalent radius from N to P but also from As to Bi only a small increase in covalent radius is observed.


Option: 4

All of the above.


Answers (1)

best_answer

 

Oxidation state of nitrogen -

Show maximum +4 oxidation state

 

Positive oxidation state of Nitrogen family -

Shows +3 and +5 oxidation states (except N2)

Stability of +3O.S increases down the group due to inert pair effect

 

+3 when only p electron are involved and +5 when all valence five (s and p) electrons are involved

 

 

 

(A) This is due to the inert pair effect in the heavier p-block elements.

(B)  3HNO_{2}\rightarrow HNO_{3}+H_{2}O+2NO

(C)  This is due to the presence of completely filled d and or f orbitals in heavier elements.

       Covalent  radius/pm;N=70,P=100,AS=120,SB=140,Bi=150.

 

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shivangi.shekhar

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