On reaction with stronger oxidizing agent like $$\mathrm{KIO}_{4}$$, hydrogen peroxide oxidizes with the evolution of $$\mathrm{O}_{2}$$. The oxidation number of $$\mathrm{I}$$ in $$\mathrm{KIO}_{4}$$ changes to __________.

For a reaction, given below is the graph of $$\ln k$$ vs $${1 \over T}$$. The activation energy for the reaction is equal to ____________ $$\mathrm{cal} \,\mathrm{mol}^{-1}$$. (nearest integer)

(Given : $$\mathrm{R}=2 \,\mathrm{cal} \,\mathrm{K}^{-1} \,\mathrm{~mol}^{-1}$$ )

Among the following the number of curves not in accordance with Freundlich adsorption isotherm is ________.

(a)

(b)

(c)

(d)

Among the following the number of state variables is ______________.

Internal energy (U)

Volume (V)

Heat (q)

Enthalpy (H)