Write two uses of $ClO_2$.

When a mixture of solid $NaCl$ and solid $K_2Cr_2O_7$ is heated with concentrated $H_2SO_4$,orange-red vapours are evolved. These vapours are of which compound?

Considering the parameters such as bond dissociation enthalpy,electron gain enthalpy and hydration enthalpy,compare the oxidising power of $F_{2}$ and $Cl_{2}$.

Fluorine with dilute $NaOH$ gives

When chlorine water is exposed to sunlight,the colour change that occurs is:

Which reaction has a positive value of $\Delta G^o$?