A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by________________?

Related Mcqs:

The value of ‘n’ for a chemical reaction A → B, whose reaction rate is → CA n, will be _______________ if the rate of the reaction increases by a factor of 8, when the concentration of is doubled?

A. 0 B. 1 C. 2 D. 3...

The following gas phase reaction is taking place in a plug flow reactor. A stoichiometric mixture of A and B at 300 K is fed to the reactor. At 1 m along the length of the reactor, the temperature is 360 K. The pressure drop is negligible and an ideal gas behaviour can be assumed. Identify the correct expression relating the concentration of A at the inlet (CA0), concentration of A at 1m (CA) and the corresponding conversion of A (X) ?

A. CA = 1.2 CA0 (1 – X)/(1 – 0.33X) B. CA = 1.2 CA0 (1 – X)/(1 – 0.5X) C. CA = 0.83 CA0 (1 – X)/(1 – 0.33X) D. CA = 0.83 CA0 (1 – X)/(1 – 0.5X)...

Fractional conversion _________________ for an exothermic reversible chemical reaction, when the temperature is maximum?

A. Increases B. Remains unchanged C. Decreases D. Unpredictable from the data...

The conversion XA and residence time data are collected for zero order liquid phase reaction in a stirred tank reactor. Which of the following will be a straight line ?

A. XA Vs . η B. XA Vs ln η C. XA/(1 – XA)Vs η D. XA(1 – XA)Vs η...

In a CSTR _______________ varies with time ?

A. Reaction rate B. Concentration C. Both A. & B. D. Neither A. nor B....