• # question_answer A nitrate of an alkali metal M on heating gives ${{O}_{2}},N{{O}_{2}}$ and ${{M}_{2}}O$. The metal M will be A)  $Na$                         B)  $K$C)  $Rb$                         D)  $Li$

Lithium nitrate gives ${{O}_{2}},\,\,N{{O}_{2}}$ and $Li{{O}_{2}}$ on heating                              $4LiN{{o}_{3}}\xrightarrow{{}}2L{{i}_{2}}O+4N{{O}_{2}}+{{O}_{2}}$ Nitrates of other alkali metals give nitrites and ${{O}_{2}}$.