In which of the following exothermic reactions, the heat liberated per mole is the highest ?

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In which of the following exothermic reactions, the heat liberated per mole is the highest ?

ChemistryThermodynamics (C)JEE MainJEE Main 2013 (25 Apr Online)

Options:

A
$\mathrm{CaO}+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{Ca}(\mathrm{OH})_2$
B
$\mathrm{SrO}+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{Sr}(\mathrm{OH})_2$
C
$\mathrm{BaO}+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{Ba}(\mathrm{OH})_2$
D
$\mathrm{MgO}+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{Mg}(\mathrm{OH})_2$

Solution:

1550 Upvotes Verified Answer

The correct answer is:
$\mathrm{CaO}+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{Ca}(\mathrm{OH})_2$

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