Which of the following statement is incorrect.
SiO only exists at high temperature.
Germanium forms stable compounds in +2 state.
Sn in +2 state is a reducing agent.
Lead in +4 state are strong oxidising agent.
Solution- Germanium forms stable compounds in +4 state and only few compounds in +2 state. As stability of lower oxidation state increases as we go down the group due to inert pair effect.
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