Which of the following reaction is spontaneous at room temperature.

see full answer

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

$I_{2} + H_{2} O \to HI + HIO$

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

$N_{2} + O_{2} \to 2 NO$

$2 HCl \to H_{2} + {Cl}_{2}$

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Spontaneous reactions are those reactions which can occur without any external factors at room temperature.
Reaction (A) is a non-spontaneous reaction because when $I_{2}$ and $H_{2} O$ are mixed then reaction doesn’t occur.
Reaction (B) is a spontaneous reaction because it can occur at room temperature without any external factors.
Reaction (C) is a non-spontaneous reaction because it can only occur in high temperature.
Reaction (D) is a non-spontaneous reaction because $HCl$ is a stable compound and it doesn’t dissociate easily.

Watch 3-min video & get full concept clarity