MCQ
Compound which on heating produces paramagnetic acidic gas?
- ✓$Mg(NO_3)_2$
- B$Fe_2(SO_4)_3$
- C$FeCO_3$
- D$HgC_2O_4$
$(b)\,\,F{e_2}{(S{O_4})_3}\xrightarrow{\Delta }F{e_2}{O_3} + S{O_3} \uparrow $
$(c)\,FeC{O_3}\xrightarrow{\Delta }FeO + C{O_2} \uparrow $
$(d)\,\,Hg{C_2}{O_4}\xrightarrow{\Delta }Hg + CO \uparrow + C{O_2} \uparrow + \frac{1}{2}{O_2} \uparrow $
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Which of the above statements are correct?
$C{l_2} + 2B{r^ - }\left( {aq} \right) \to 2C{l^ - }\left( {aq} \right) + B{r_2}$
$Br_2$ gas thus formed is dissolved into solution of $Na_2CO_3$ and then pure $Br_2$ is obtained by treatment of the solution with


$Mg^{2+} + 2{e^ - } \to Mg(s)\;E^o = - 2.37\,V$
$Cu^{2+} + 2e^- \to Cu(s)\;E^o = + 0.34\,V$