The products formed on heating Pb(NO₃)₂ are -

1. $\mathrm{PbO},<mspace\; width="1em"></mspace>{\mathrm{N}}_2,<mspace\; width="1em"></mspace>{\mathrm{O}}_2$

2. Pb(NO₂ )_2,O₂

3. $\mathrm{PbO},<mspace\; width="1em"></mspace>{\mathrm{NO}}_2,<mspace\; width="1em"></mspace>{\mathrm{O}}_2$

4. $\mathrm{Pb},<mspace\; width="1em"></mspace>{\mathrm{N}}_2,<mspace\; width="1em"></mspace>{\mathrm{O}}_2$

The incorrect statement among the following is -

1. ${\mathrm{PbX}}_2$ is more stable than ${\mathrm{PbX}}_4$

2. ${\mathrm{PbCl}}_4$ is less stable than ${\mathrm{SnCl}}_4$ but ${\mathrm{PbCl}}_2$ is more stable than ${\mathrm{SnCl}}_2$

3. ${\mathrm{PbCl}}_4$ is less stable than ${\mathrm{SnCl}}_4$

4. Pb(II) is a good reducing agent while Sn(II) is not