Blackened oil painting can be restored into original form by the action of :

The last drop of water can be removed from $H_2O_2$ by

The volume strength of $8.9 \, M \, H_{2}O_{2}$ solution calculated at $273 \, K$ and $1 \, atm$ is.........
$(R = 0.0821 \, L \, atm \, K^{-1} \, mol^{-1})$ (rounded off to the nearest integer)

Calculate the strength of $10$ volume solution of hydrogen peroxide. (in $, g/L$)

What product is formed when $I_2$ reacts with $H_2O_2$ in a basic medium?

In the reaction between $BaO_2$ and $H_2SO_4$,the oxidation state of the most electronegative element in the products is .......