JEE Main 2002 Chemistry question

The formation of gas at the surface of tungsten due to adsorption is the reaction of order

(1)0Correct
(2)1
(3)2
(4)insufficient data

Answer: (1)

Solution

For gas-phase decomposition on a metal surface such as tungsten at high pressure, the surface is fully covered (saturated) with adsorbed molecules, so the rate is independent of the gas concentration

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Question ID VK-037961