• # question_answer A mixture of hydrazine, hydrogen peroxide and Cu(II) catalyst is used as rocket fuel. Why?

In the presence of Cu(II) catalyst, hydrogen peroxide oxidises hydrazine $(N{{H}_{2}}-N{{H}_{2}})$ to nitrogen. The reaction is highly exothermic and is accompanied by large increase in volume. Therefore, the mixture provides an upward thrust and is used as a rocket fuel. $N{{H}_{2}}-N{{H}_{2}}\,(l)\,+2{{H}_{2}}{{O}_{2}}(l)$$\xrightarrow[Heat]{Cu(II)}\,{{N}_{2}}(g)+4{{H}_{2}}O(g)+\text{heat}\,$