For a vapour phase catalytic reaction (A + B P) which follows the Ridel mechanism and the reaction step is rate controlling, the rate of reaction is given by (reaction rate is irreversible, product also absorbs).

• A. <img src="/_files/images/chemical-engineering/chemical-reaction-engineering/475-472-1.png">
• B. <img src="/_files/images/chemical-engineering/chemical-reaction-engineering/475-472-2.png">
• C. <img src="/_files/images/chemical-engineering/chemical-reaction-engineering/475-472-3.png">
• D. <img src="/_files/images/chemical-engineering/chemical-reaction-engineering/475-472-4.png">