A) Exothermic
B) Endothermic
C) Reversible
D) Irreversible and endothermic
Correct Answer: A
Solution :
\[2Na+2HOH\to 2NaOH+{{H}_{2}}\uparrow \] \[2K+2HOH\to 2KOH+{{H}_{2}}\uparrow \]
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