In Merck’s method, hydrogen peroxide is obtained from?
In Merck’s method, hydrogen peroxide is obtained from?

1.\,\,Ba{{O}_{2}}+{{H}_{2}}S{{O}_{4}}

2.\,\,N{{a}_{2}}{{O}_{2}}+{{H}_{2}}S{{O}_{4}}

3.\,\,Ba{{O}_{2}}+{{H}_{3}}P{{O}_{4}}

4.\,\,Ba{{O}_{2}}+{{H}_{2}}O+C{{O}_{2}}

Solution: 2.\,\,N{{a}_{2}}{{O}_{2}}+{{H}_{2}}S{{O}_{4}}

Merck’s method is as follows:-

N{{a}_{2}}{{O}_{2}}+{{H}_{2}}S{{O}_{4}}\,\,\to \,\,N{{a}_{2}}S{{O}_{4}}+{{H}_{2}}{{O}_{2}}

Small volumes of sodium peroxide are introduced to a 20% ice cold {{H}_{2}}S{{O}_{4}} solution with continual stirring. When the N{{a}_{2}}S{{O}_{4}}.10{{H}_{2}}O crystals separate during cooling, the solution comprises 30%  {{H}_{2}}{{O}_{2}}. Vacuum distillation can provide a pure sample of  {{H}_{2}}{{O}_{2}}.