Decreases continuously

Increases continuously

Remains constant

Increases initially and then decreases

Reducing property

Oxidising property

Bleaching property

Acidic property

reducing

oxidising

acidic

catalytic

Priestley

Thenard

Gay-Lussac

Bernard

Electrolysis of $H_2SO_4$

Hydrolysis of peroxodisulphates

Reaction of barium peroxide with $H_2SO_4$

Direct reaction of $H_2$ and $O_2$

planar

non - planar

spherical

linear

Neutral medium

Acidic medium

Alkaline medium

acidic as well as in alkaline medium

Silica

$Mn{O_2}$

Alumina

Acetanilide

$100{\rm{ }}^\circ$

$90{\rm{ }}^\circ$

$109{\rm{ }}^\circ 28'$

$180{\rm{ }}^\circ$

By burning hydrogen in excess of oxygen

By the action of ${{\rm{H}}_2}{{\rm{O}}_2}\;{\rm{on}}\;{\rm{Ba}}{{\rm{O}}_2}$

By the action of ${{\rm{H}}_2}{\rm{S}}{{\rm{O}}_4}\;{\rm{on}}\;{\rm{N}}{{\rm{a}}_2}{{\rm{O}}_2}$

By electrolysis of $50\% \;{{\rm{H}}_2}{\rm{S}}{{\rm{O}}_4}$

Passing ${\rm{C}}{{\rm{O}}_2}$ into ${{\rm{Ba}}{{\rm{O}}_2}}$

Adding ${\rm{Mn}}{{\rm{O}}_2}$ to dil. ${{\rm{H}}_2}{\rm{S}}{{\rm{O}}_4}$

Adding N${\rm{N}}{{\rm{a}}_2}{{\rm{O}}_2}$ to cold water

Adding ${\rm{Pb}}{{\rm{O}}_2}$ into ${\rm{KMn}}{{\rm{O}}_4}$