Question

3) NO, NO
7. Lead Nitrate is strongly heated. In this reaction
the oxidation numbers of following atoms change
Only in Pb and N 2) Only in N and O
3) Ph, N and O
4) Only in N​

Answer 1

Answer:

Only in N

Explanation:

if we see the reaction it will be

2 Pb(NO3)2 = 2 PbO + 4 NO2 + O2

if we calculate the ON of On in reactants, we get

Pb + 2(NO3)=0

since NO3 has a valency of -1

so valency of Pb is +2

N + 3O=-1

since O has valency -2

so valency of N=+5

O has a valency of -2

in products,

Pb+O=0

so, Pb will have valency +2 since valency of O is -2

N+2O=0

so, N will have valency +4 since valency of O is -2

since O shares 2 electrons in a molecule, so it will have ON of -2

thus we can say that N has a change in it's ON.

[Here ON means oxidation number.

And we have used the logic,

sum of ON of all element in a compound/radical is equal to the valency of the species.