LIST- I contains compounds and LIST- II contains reactions LIST- I LIST- II I H 2 O 2 P Mg HCO 3 2 + Ca OH 2 → II Mg OH 2 Q BaO 2 + H 2 SO 4 → III BaCl 2 R Ca OH 2 2 +

Question

LIST- I contains compounds and LIST- II  contains reactions   LIST- I   LIST- II I H 2 O 2 P Mg HCO 3 2 + Ca OH 2 &#8594; II Mg OH 2 Q BaO 2 + H 2 SO 4 &#8594; III BaCl 2 R Ca OH 2 2 +

Accepted Answer

In this method calculated amount of lime is added to hard water. It precipitates out calcium carbonate and magnesium hydroxide which can be filtered off P &#160; &#160; Mg HCO 3 2 + 2 Ca OH 2 &#10230; 2 CaCO 3 &#8595; + Mg OH 2 &#8595; + 2 H 2 O T &#160; &#160; Ca HCO 3 2 + Ca OH 2 &#10230; 2 CaCO 3 &#8595; + 2 H 2 O R &#160; &#160; Ca OH 2 + MgCl 2 &#10230; Mg OH 2 + CaCl 2 Acidifying barium peroxide and removing excess water by evaporation under reduced pressure gives hydrogen peroxide Q &#160

Hydrogen — Previous Year Questions & Solutions