A) \[N{{a}_{2}}{{O}_{2}}+2HCl\]
B) \[Mg+{{H}_{2}}O\]
C) \[Ba{{O}_{2}}+HCl\]
D) \[{{H}_{2}}{{S}_{4}}{{O}_{8}}+{{H}_{2}}O\]
Correct Answer: B
Solution :
Hydrogen is produced during the reaction: \[Mg+{{H}_{2}}O\xrightarrow{{}}Mg{{(OH)}_{2}}+{{H}_{2}}\uparrow \] All others are used for manufacture of \[{{H}_{2}}{{O}_{2}}\] \[{{H}_{2}}{{S}_{2}}{{O}_{8}}+2{{H}_{2}}O\xrightarrow{{}}{{H}_{2}}{{O}_{2}}+2{{H}_{2}}S{{O}_{4}}\] \[N{{a}_{2}}{{O}_{2}}+2\,dil.\,HCl\xrightarrow{{}}2NaCl+{{H}_{2}}{{O}_{2}}\] \[Ba{{O}_{2}}+2\,dil.\,HCl\xrightarrow{{}}BaC{{l}_{2}}+{{H}_{2}}{{O}_{2}}\]
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