MCQ
$XeO_4$ molecule is tetrahedral having
- ATwo $P\pi - d\pi $ bonds
- BOne $P\pi - d\pi $ bonds
- ✓Four $P\pi - d\pi $ bonds
- DThree $P\pi - d\pi $ bonds

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$(a)$ Heat of combustion reaction
$(b)$ Heat of formation reaction
$(c)$ An exothermic reaction
$(d)$ Not neutralization reaction
