MCQ
When a sulphur atom becomes a sulphide ion
- AThere is no change in the composition of atom
- ✓It gains two electrons
- CThe mass number changes
- DNone of these
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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 $HBr?$
