1.

At 500 K, the half-life period of a gaseous reaction at the initial pressure of 80 kPa is 350 sec. When the pressure is 40 kPa, the half-life period is 175 sec. The order of the reaction is

Answer»

ZERO
one
two
three

Solution :When initial pressure is halved, the half-life PERIOD is also halved. This SHOWS that `t_(1//2) PROP` initial pressure. This is so for REACTIONS of zero order.


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