Chemical Reaction Quiz 4

If Thiele modulus is _________, then the pore diffusion resistance in a catalyst may be considered as negligible?

If the pore diffusion controls in a catalytic reaction, the apparent activation energy Ea is equal to_____?

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

In case of physical adsorption, the heat of adsorption is of the order of ______ kcal/kg mole?

For the same residence time, which one will give the maximum conversion ?

If ?G (free energy change) for a chemical reaction is very large and negative, then the reaction is_________?

In a reversible reaction, a catalyst increases the rate of forward reaction___________?

In a first order reaction, the time required to reduce the concentration of reactant from 1 mole/litre to 0.5 mole/litre will be _______ that required to reduce it from 10 moles/litre to 5 moles/litre in the same volume ?

If CA is the quantity of reactants initially present, the quantity left after ?n? half periods will be equal to___________?

From collision theory, the reaction rate constant is proportional to__________?

In case of ______ reactions, the reaction rate does not decrease appreciably as the reaction proceeds?

In a chemical reaction, _______ are conserved?

In autocatalytic reactions ?

Higher free energy of activation of a chemical reaction (at a given temperature) implies ______?

Half life period of a first order irreversible reaction A ? B is ________?

From Arrhenius law, a plot of loge K versus 1/T gives a straight line with a slope of (-E/R). The unit of E/R is_____?

In case of calcination of limestone, CaCO3 CaO + CO2, the addition of more of CaO will result in ________ in the concentration of CO2?

Half-life period for a first order reaction is ______ the initial concentration of the reactant?

Half life period of decomposition of a liquid ?A? by irreversible first order reaction is 12 minutes. The time required for 75% conversion of ?A? is ______ minutes?

In a zero order reaction, reactants concentration does not change with time and the__________?

Half life period of a chemical reaction is__________?

In a chemical reaction, represented by as shown in the bellow figure, it is observed that the (i) Rate of reaction increases by a factor of 4 on doubling the concentration of the reactant. (ii) Rate of reaction increases by a factor of 9 on trebling the concentration of the reactant. Then the rate of the reaction is proportional to(where, CA = concentration of the reactant)_______?

Holding time for flow reactors is ________ the space time, for constant fluid density ?

If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is ________?

For the reaction, A + B ? 2B + C,_____?

In a continuous flow stirred tank reactor, the composition of the exit stream__________?

From among the following, choose one which is not an exothermic process ?

In case of a/an _______ chemical reaction, conversion increases with the rise in temperature?

In a consecutive reaction system of the given figure bellow, when E1 is much greater than E2, the yield of B increases with the______?

In an exothermic chemical reaction, the reactants compared to the products have___________?

Fractional conversion ______ with increase in pressure for ammonia synthesis reaction i.e., N2 + 3H2 ? 2NH3?

If the rate of a chemical reaction becomes slower at a given temperature, then the___________?

In a semi-batch reactor _______?

In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will_________?

In an ideal mixed reactor (at steady state), the _____?

In an ideal P.F.R. at steady state conditions _____?

If pore diffusion is the controlling step in a solid catalysed reaction, the catalyst_____?

In case of a ______ reactor, the composition in the reactor and at the exit of the reactor is the same ?

In a semi-batch reactor ___________?

If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the _________ diffusion?

In case of a P.F.R., there_____?

If ?n? is the order of reaction, then unit of rate constant is __________?

In an ideal tubular-flow reactor__________?

In a chemical reaction as shown in the bellow figure, it is observed that the (i) Rate of formation of ?P? is doubled on doubling the concentration of ?X? (ii) Rate of formation of ?P? is quadrupled on doubling the concentration of ?Y? (iii) Doubling the concentration of ?Z? does not affect the rate of formation of ?P? What is the order of the above chemical reaction ?

In a/an ______ vessel, the fluid enters and leaves following plug flow?

Helium-mercury method can be used to determine the ______ of the catalyst particle?

Given, 3H2 + CO = CH4 + H2O, KP = 101.84 and, 4H2 + CO2 = CH4 + 2H2O, KP = 101.17 the KP for the reaction CO + H2O = CO2 + H2 is ___________?

Helium-mercury method is used for the measurement of the _________ of the catalyst?

In a/an _______ reactor, there is exchange of heat with the surroundings with sizeable temperature variation?

For the reversible reaction A ? 2B, if the equilibrium constant K is 0.05 mole/litre; starting from initially 2 moles of A and zero moles of B, how many moles will be formed at equilibrium ?