MCQ
Select equation having exothermic step
- A$S_{\left( g \right)}^ - \to S_{\left( g \right)}^{ - 2}$
- ✓$Na_{\left( g \right)}^ + + Cl_{\left( g \right)}^ - \to NaC{l_{\left( s \right)}}$
- C${N_{\left( g \right)}} \to N_{\left( g \right)}^ - $
- D$Al_{\left( g \right)}^{ + 2} \to Al_{\left( g \right)}^{ + 3}$
