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Which of the following reaction is spontaneous at room temperature

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$I_{2} + H_{2} O ⟶$

$2 H_{2} + O_{2} \overset{Pt}{⟶} 2 H_{2} O$

$N_{2} + O_{2} ⟶ 2 NO$

$2 HCl ⟶ H_{2} + {Cl}_{2}$

answer is B.

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Detailed Solution

Exothermic reactions are generally spontaneous at room temperature

Formation of H₂O is a combustion reaction, exothermic in nature and is spontaneous reaction

Formation of NO is an endothermic reaction

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