MCQ
Choose the correct order for the given properties
- A$NaF < MgF_2 < AlF_3$ : covalent character order
- B$NaF < MgF_2 < AlF_3$ : melting point order
- C$NaF < MgF_2 < AlF_3$ : lattice energy order
- ✓All of above are correct
Covalent character as per Fajan's rule.
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$H{_2(g)} + 2ICl_{(g)} \to 2HCl_{(g)} + I_{2(g)}$
This reaction is of first order with respect to $H_{2(g)}$ and $ICl_{(g)}$ , following mechanisms were proposed
Mechanism $A$ :
$H{_2(g)} + 2ICl_{(g)} \to 2HCl_{(g)} + I_{2(g)}$
Mechanism $B$ :
$H_{2(g)} + ICl_{(g)} \to HCl_{(g)} + HI_{(g)}$ ; Slow
$HI_{(g)} + ICl_{(g)} \to HCl_{(g)} + I_{2(g)}$ ; Fast
Which of the above mechanism $(s)$ can be consistent with the given information about the reaction
$I_{2(g)} \rightleftharpoons 2I_{(g)} ; \Delta_f H^o = +150\,kJ$
The forward reaction is favoured at