For a reaction, the threshold energy is $75 \mathrm{~kJ} /$ mole. If the internal energy of the reactants is 20 $\mathrm{kJ} /$ mole, the activation energy (in $\mathrm{kJ} /$ mole) is

The process in which colloids, when subjected to DC electric field move towards an electrode is

$$ \text { Match the following } $$

$$ \text { The correct match } $$

In the following, the oxoacid with a peroxy bond is