Redox Reactions...

Oxidation number of sodium in sodium amalgam is:

Which of the following shows highest oxidation number in combined state?

$${ I }_{ 2 }+KI\rightarrow { KI }_{ 3 }\quad $$
In the above reaction:

Oxidation state of oxygen in hydrogen peroxide is?

Oxidation number of sulphur in $$Na_2S_2O_3$$ would be :

The oxidation state of Al in $$LiAlH_4$$ is:

Which of the following shows highest oxidation number in combined state?

In $$Ni{(CO) }_{ 4 }$$ the oxidation state of Ni is:

In acidic medium $$H_{2}O_{2}$$ changes $$Cr_{2}O_{7}$$ to $$CrO_{5}$$ which has two $$-O-O-$$ bonds. Oxidation state of $$Cr$$ in $$CrO_{5}$$ is:

Reaction in which exactly two carbons are oxidized ?