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Chemistry · PYQ NEET UG 2016(2)
हिन्दीThe decomposition of phosphine (\( \text{PH}_3 \)) on tungsten at low pressure is a first order reaction. It is because the ______
Correct answer · Option 2
rate is proportional to the surface coverage
Explanation
At low pressures, adsorption is proportional to pressure, making the surface coverage \( \theta \) small, so the rate depends linearly on \( \theta \) (first order).
