MCQ
A metal used in storage batteries is
- ACopper
- ✓Lead
- CTin
- DNickel
$Pb ( s )+ PbO _2( s )+2 H _2 SO _4( aq ) \rightarrow 2 P bSO _4( s )+2 H _2 O ( g )$
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(Given $\log 5 = 0.70, \log 3 = 0.48$)
...... $joule$
${C_({graphite)}} + {O_2} \to C{O_2};\,\Delta H = - 393.4\,kJ/mole$
${C_({graphite})} \to {C_{{\rm({diamond})}}};\,\Delta H = $
$2CHI_3 + 6Ag \to 6AgI(s) + C_2H_2(g)$
$3MnO_4^{2-} + 2H_2O \rightleftharpoons 2MnO_4^- + MnO_2 + 4OH^-$
The reaction can go to completion by removing $OH^-$ ions by adding