An amphoteric  oxide among the following is-

1. CO₂

2. CO

3. SnO₂

4. CaO

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

The most characteristic oxidation state for lead and tin is, respectively,:

1. +4, +2

2. +2, +4

3. +4, +4

4. +2, +2

A species among the following that decomposes easily is: -

When ${\mathrm{SnCl}}_2$ reacts with ${\mathrm{HgCl}}_2$, the product formed is-

1. $\mathrm{Sn}+{\mathrm{HgCl}}_4$

2. $\mathrm{Sn}+{\mathrm{Cl}}_2+{\mathrm{Hg}}_2{\mathrm{Cl}}_2$

3. ${\mathrm{SnCl}}_4<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{Hg}}_2{\mathrm{Cl}}_2$

4. None of the above