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  4. Under what condition the order of the reaction, 2HI xrightarrowΔ , textcatalyst H2 (g) + I2 (g) , is zero

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Q. Under what condition the order of the reaction,
$2HI \xrightarrow{\Delta , \text{catalyst}} H_2 (g) + I_2 (g)$ , is zero

KEAMKEAM 2018Chemical Kinetics

Solution:

The reaction,

$2 HI \xrightarrow{\Delta, \text { catalyst }} H _{2}(g)+ I _{2}(g)$ is of zero-order in which HI is present at high partial pressure.