MCQ
Which metal gives $NH_4 NO_3$ , when react with dilute $HNO_3$ acid?
- ✓$Zn$
- B$Pb$
- C$Cu$
- D$Au$
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$C_{(graphite)} + CO_{2(g)} \rightarrow 2CO _{(g)}$
are $170\, kJ$ and $170\, J K^{-1},$ respectively. This reaction will be spontaneous at ............ $\mathrm{K}$