MCQ
All possible optical isomers of the complex are $[Pt(NH_3)_2(CN)_2]$
- A$6$
- B$2$
- C$4$
- ✓$0$
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| List-I (Molecule) | List-II (Bond order) |
| (a) $Ne _2$ | (i) 1 |
| (b) $N _2$ | (ii) 2 |
| (c) $F _2$ | (iii) 0 |
| (d) $O _2$ | (iv) 3 |
$(i)\,2Fe(s)\, + \,\frac{3}{2}\,{O_2}\,(g)\, \to \,F{e_2}{O_3}\,(s)\,;$ $\Delta {H^\Theta }\, = \ \,-193.4\,kJ$
$(ii)\,Mg(s)\, + \,\,{O_2}\,(g)\, \to \,MgO\,(s)\,;$ $\Delta {H^\Theta }\, = \, - \,140.2\,kJ$
What is $\Delta {H^\Theta }$ of the reaction ?
$3Mg + Fe_2O_3 \to 3MgO + 2Fe$
.......$kJ$