Redox Reactions...

In which of the following species,the average oxidation state of oxygen is $$\frac{-1}{2}$$?

Which of the following equation depict the oxidising nature of $$H_{2}O_{2}$$?

How many oxygen atoms in blue per chomate $${ CrO }_{ 5 }$$  are having $$-1$$ oxidation state?

Which one of the following statements is not correct?

Given that $$ { Cl }_{ 2\left( g \right)  }+{ 2e }^{ - }\longrightarrow { 2Cl }^{ - }\left( aq \right)$$ is the reduction half-reaction for the overall reaction $$ 2Ag\left( s \right) +{ Cl }_{ 2 }\left( g \right) \longrightarrow 2AgCl\left( s \right)$$. 

The oxidation state of Fe in $$ \left[ Fe\left( { H }_{ 2 }{ O } \right) _{ 5 }NO \right] { SO }_{ 4 }$$ is :

The oxidation state(s) of $$Cl$$ in $$CaO_{2}Cl_{2}$$ (bleaching powder) is/are:

Which of the following metals form complex in zero oxidation state?

Covalency and oxidation number of nitrogen in $${ N }_{ 2 }{ O }_{ 5 }$$  is respectively :

The oxidation number of 'N' in NOClO: