MCQ
The correct order of density is
- A$Be > Mg > Ca > Sr$
- B$Sr > Ca > Mg > Be$
- ✓$Sr > Be > Mg > Ca$
- D$Be > Sr > Mg > Ca$
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The correct structure of
$x\ MnO + y\ PbO_2 + z\ HNO_3 \to a\ HMnO_4 + b\ Pb(NO_3 )_2 + c\ H_2O$