MCQ
Which of the following molecule contains both ionic and covalent bond
- A$CH_2Cl_2$
- ✓$K_2SO_4$
- C$BeCl_2$
- D$SO_2$
$2{K^ + } \vdots \vdots \vdots \vdots \vdots \vdots \vdots \vdots SO_4^{2 - }$
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$H _{2( g )}+ Br _{2( g )} \rightarrow 2 HBr _{( g )}$
Given that bond energy of $H _{2}$ and $Br _{2}$ is $435 \;kJ mol ^{-1}$ and $192 \;kJ mol^{-1}$, respectively, what is the bond energy (in $kJ mol ^{-1}$ ) of $HBr?$

| $[A] (mol\,L^{-1})$ | $[B] (mol\,L^{-1})$ | Initial Rate $(mol\, L^{-1}\,s^{-1} )$ |
| $0.05$ | $0.05$ | $0.045$ |
| $0.10$ | $0.05$ | $0.090$ |
| $0.20$ | $0.10$ | $0.72$ |