Redox Reactions...

In the reaction between acidified $$ KMnO_{4}$$ and hot oxalic acid, the species that gains electrons is:

Oxidation number of sulphur in marshall's acid $$(H_{2}S_{2}O_{8})$$ is

$$H_{2}O_{2}+O_{3}\rightarrow H_{2}O+2O_{2}$$, in this reaction

Which of the following statement is wrong?

Oxidation number of $$Cr$$ in $$KCrO_{4}^-$$ is:

$$1$$ mole of $$N_{2}H_{4}$$ lost $$10$$ moles of electrons and formed a new compound, $$Y$$, in which all hydrogens are present without any change in the oxidation state. The oxidation number of nitrogen in the new compound, $$Y$$, is:

Which is not a redox reaction?

The oxidation number(s) of nitrogen in $$NH_{4} NO_{3}$$ is/are

What is the oxidation state of chlorine in hypochlorous acid?

Oxidation state of $$N$$ is given correct in :