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In case of physical adsorption, the heat of adsorption is of the order of _____________ kcal/kg mole?
Related MCQs
Which of the following is a controlling factor in very fast heterogeneous reaction ?
For a zero order chemical reaction, the__________?
An imbalanced chemical reaction equation is against the law of__________?
__________ is the response curve for a step input signal from a reactor ?
‘N’ plug flow reactors in series with a total volume ‘V’ gives the same conversion as a single plug flow reactor of volume ‘V’ for __________ order reactions?
Enzymes are destroyed, when the__________?
Ionic reactions occur in__________?
With decrease in temperature, the equilibrium conversion of a reversible endothermic reaction__________?
In a chemical reaction, __________ are conserved?
Sulphuric acid is used as a catalyst in the__________?
An autothermal reactor is__________?
Which of the following will favour the reverse reaction in a chemical equilibrium reaction ?
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) ?
At a given temperature, K1, K2 and K3 are equilibrium constants for the following reactions 1, 2, 3 respectively. CH4(g) + H2O(g) ⇌ CO(g) + 3H2(g), CO(g) + H2O(g) ⇌ CO2(g) + H2(g) CH4(g) + 2H2O(g) ⇌ CO2(g) + 4H2(g) Then K1, K2 and K3 are related as ?
For reactions in parallel viz A → P (desired product) and A → Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a__________?
A first order reaction requires two unequal sized CSTR. Which of the following gives higher yield ?
The rate of a chemical reaction is almost doubled for every 10°C rise in temperature. The rate will increase __________ times, if the temperature rises from 10 to 100°C?
For the liquid phase zero order irreversible reaction A → B, the conversion of A in a CSTR is found to be 0.3 at a space velocity of 0.1min-1. What will be the conversion for a PFR with a space velocity of 0.2 min-1? Assume that all the other operating conditions are the same for CSTR and PFR ?
When the density of the reaction mixture is constant in a chemical reaction, the ratio of the mean residence time to space time is__________?
A reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction?
Which of the following is an independent variable for a batch tank reactor with uniform concentration and temperature ?
When all the limiting reactant is consumed in the reaction, the operational yield __________ the relative yield?
In flow reactors, the performance equations interrelate the rate of reaction to the__________?
In an ideal tubular-flow reactor__________?
In a/an __________ reactor, there is exchange of heat with the surroundings with sizeable temperature variation?
When a catalyst increases the rate of forward reaction, the value of rate constant__________?
For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a __________ reactor?
For a gaseous phase reaction, rate of reaction is equal to K. CA . CB. If the volume of the reactor is suddenly reduced to 1/4th of its initial volume, then the rate of reaction compared to the original rate will be __________ times?
The effect of increasing pressure on the gaseous equilibrium of the reaction 2X + 3Y ⇌ 3X + 2Y indicates that__________?
Signal normally used to study non-ideal flow by stimulus response technique is __________ input?
A high space velocity means that a given__________?
At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenius law is used. What will be this ratio, if transition state theory is used with the same value of „E/R‟ ?
Effective diffusivity (DE) in a catalyst pellet is related to molecular diffusivity (DN) and Knudsen diffusivity (DK) as__________?
Which of the following is not a chemical step in a fluid solid catalytic reaction ?
In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will__________?
Catalyst carriers__________?
Rate determining step in a reaction consisting of a number of steps in series is the __________ step?
__________ is the controlling step in a highly temperature sensitive fluid-solid non-catalytic reaction ?
If in the gaseous phase reaction, N2O4 ⇌ 2NO2, x is the part of N2O4 which dissociates, then the number of molecules at equilibrium will be__________?
The catalyst in a second order reversible reaction increases the rate of the forward reaction__________?
The rate constant of a first order reaction depends on the __________?
The units of frequency factor in Arrhenius equation__________?
Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is ?
A catalyst in a chemical reaction __________ free energy change in the reaction?
The ratio of volume of mixed reactor to the volume of P.F.R. (for identical flow rate, feed composition and conversion) for zero order reaction is__________?
The catalytic activity of enzymes is due to their capacity to lower the __________ energy?
In case of __________ reactions, the reaction rate does not decrease appreciably as the reaction proceeds?
Conversion increases with increase in temperature in case of a/an __________ reaction?
Considering the endothermic dissociation of CaCO3 in a closed vessel (CaCO3 ⇌ CaO + CO2), the pressure of CO2 increases, if__________?
Thermodynamic equilibrium constant in a system is affected by__________?
Sum of the powers of the concentration terms in the rate equation is called the __________ of the reaction?
In case of physical adsorption, the heat of adsorption is of the order of _____________ kcal/kg mole?
A. 100
B. 1000
C. 10000
D. 100000
Correct Answer:
100
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Last Updated:
February 24, 2019