The oxidation number of $N$ in $N_3H$ is ..........

$2.5 \ mol$ of hydrazine $(N_2H_4)$ loses $25 \ mol$ of electrons to form a new compound $X$. Assuming all lost electrons are contained in the new compound,what is the oxidation state of nitrogen in compound $X$?

An acidic solution of sodium thiosulfate is unstable because in thiosulfate,the two sulfur atoms have different oxidation states of:

In $KO_2$,the nature of oxygen species and the oxidation state of oxygen atom are,respectively

The correct formula for the paramagnetic acid is:

What is the oxidation state of phosphorus in the phosphate ion $(PO_4^{3-})$?