1.

The differential rate law for the reaction \[{{H}_{2}}+{{I}_{2}}\to 2HI\] is                                  [AIEEE 2002]

A.                 \[-\frac{d[{{H}_{2}}]}{dt}=-\frac{d[{{I}_{2}}]}{dt}=+\frac{1}{2}\frac{d[HI]}{dt}\]
B.                 \[\frac{d[{{H}_{2}}]}{dt}=\frac{d[HI]}{dt}=\frac{1}{2}\frac{d[HI]}{dt}\]
C.                 \[\frac{1}{2}\frac{d[{{H}_{2}}]}{dt}=\frac{1}{2}\frac{d[{{I}_{2}}]}{dt}=-\frac{d[HI]}{dt}\]
D.                 \[-2\frac{d[{{H}_{2}}]}{dt}=-2\frac{d[{{I}_{2}}]}{dt}=+\frac{d[HI]}{dt}\]
Answer» B.                 \[\frac{d[{{H}_{2}}]}{dt}=\frac{d[HI]}{dt}=\frac{1}{2}\frac{d[HI]}{dt}\]


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