Oxidation number of carbon in $C{H}_2{F}_{2}CH\_2\; F\_2$ is …………

In calcium hydride $(Ca{H}_2)(CaH\_2\; )$, the oxidation number of hydrogen is …………

The element with atomic number 9 can exhibit oxidation state of …………

The highest and lowest oxidation states possible for Te (group 16) are …………

What is the oxidation state of S in $N{a}_2{S}_{2}Na\_2\; S\_2$  ?

The oxidation state of S in $S_2{O}_8{}^{2-}S\_2O\_8\{^\{2-\}\}$ is ………

The oxidation state of phosphorus in $Ba(H_{2}P{O}_2{)}_{2}Ba(H\_2PO\_2)\_2$ is ………

In which of the following compounds, the oxidation number of carbon is NOT zero?

The oxidation number of S in $S_{8}S\_8$ , $S_2{F}_{2}S\_2F\_2$ and $H_{2}SH\_2S$ respectively are ………

$3CuO+2N{H}_3\to N_2+3H_{2}O+3Cu3CuO\; +\; 2NH\_3\; \backslash rightarrow\; N\_2\; +\; 3H\_2\; O\; +\; 3Cu$ the change of $N{H}_{3}NH\_3$ to $N_{2}N\_2$ involve ………