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QJEEM22Ch676b: JEE Main 2022 Chemistry - Class 12 JEEM22Ch676b Solution: The half life for the decomposition of gaseous compound is when …

The half life for the decomposition of gaseous compound A\mathrm{A} is 240 s240 \mathrm{~s} when the gaseous pressure was 500 Torr initially. When the pressure was 250 Torr, the half life was found to be 4.04.0 min. The order of the reaction is ______________. (Nearest integer)

Step-by-Step Verified Solution

(t1/2)A=240 s\left(\mathrm{t}_{1 / 2}\right)_{\mathrm{A}}=240 \mathrm{~s} when P=500\mathrm{P}=500 torr

(t1/2)A=4min⁡=4×60=240\left(t_{1 / 2}\right)_{A}=4 \min =4 \times 60=240 sec when P=250P=250 torr

If means half-life is independent of concentration of reactant present.

∴\therefore Order of reaction =1=1

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