MCQ
The correct sequence of increasing covalent character is represent by
- A$LiCl < NaCl < BeCl_2$
- B$BeCl_2 < LiCl < NaCl$
- ✓$NaCl < LiCl < BeCl_2$
- D$BeCl_2 < NaCl < LiCl$
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$\begin{array}{*{20}{c}}{ - OAc}\\{\rm{I}}\end{array}$$\begin{array}{*{20}{c}}{ - OMe}\\{{\rm{II}}}\end{array}$$\begin{array}{*{20}{c}}{ - OS{O_2}Me}\\{{\rm{III}}}\end{array}$$\begin{array}{*{20}{c}}{ - OS{O_2}C{F_3}}\\{{\rm{IV}}}\end{array}$
The order of leaving group ability is


$Br_{2(l)} + Cl_{2(g)} \rightarrow 2BrCl_{(g)}$
are $30\ kJ\ mol^{-1}$ and $105\ J\ K^{-1} mol^{-1}$ respectively. The temperature at which the reaction will be in equilibrium is ............... $\mathrm{K}$