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You Are On Multi Choice Question Bank SET 353

17651. The excess energy of reactants in a chemical reaction required to dissociate into products is termed as the __________ energy.

17652. For a solid catalysed chemical reaction, the effectiveness of solid catalyst depends upon the __________ adsorption.

17653. Loans and advances which are out of order in repayment are

17654. The dimensions of rate constant for reaction 3A B are (l/gm mole)/min. Therefore the reaction order is

17655. Who is entrusted with the function of currency issue?

17656. If the time required to complete a definite fraction of reaction varies inversely as the concentration of the reactants, then the order of reaction is

17657. Sulphuric acid is used as a catalyst in the

17658. Fractional conversion __________ with increase in pressure for ammonia synthesis reaction i.e., N2 + 3H2 2NH3.

17659. Banks follow this system of posting.Name it

17660. The reason why a catalyst increases the rate of reaction is that, it

17661. A first order irreversible reaction, A B is carried out separately in a constant volume as well as in a variable volume reactor for a particular period. It signifies that __________ in the two reactors.

17662. When the density of the reaction mixture is constant in a chemical reaction, the ratio of the mean residence time to space time is

17663. In an ideal tubular-flow reactor

17664. 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 Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R?

17665. __________ is the controlling step in a highly temperature sensitive fluid-solid non-catalytic reaction.

17666. An autothermal reactor is

17667. The rate constant of a first order reaction depends on the

17668. A reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction.

17669. 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

17670. Which of the following will favour the reverse reaction in a chemical equilibrium reaction ?

17671. Conversion increases with increase in temperature in case of a an __________ reaction.

17672. Effective diffusivity (DE) in a catalyst pellet is related to molecular diffusivity (DN) and Knudsen diffusivity (DK) as

17673. A photochemical reaction is __________ light.

17674. Presidency Banks amalgamated to form

17675. In a/an __________ reactor, there is exchange of heat with the surroundings with sizeable temperature variation.

17676. 'Unreacted core model' represents the reaction involving

17677. First FM (Frequency Modullation) Radio Station in Kerala?

17678. If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion.

17679. The units of frequency factor in Arhenious equation

17680. Which of the following is not a chemical step in a fluid solid catalytic reaction ?

17681. Fifth generation computers are likely to exhibit?

17682. 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:

17683. In case of __________ reactions, the reaction rate does not decrease appreciably as the reaction proceeds.

17684. For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a __________ reactor.

17685. What is the Thiele modulus of the solid catalysed first order reaction, , if the pore diffusion offers negligible resistance to reaction ?

17686. B.E.T. method can be used to determine the __________ of a porous catalyst.

17687. 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

17688. Which of the following is an independent variable for a batch tank reactor with uniform concentration and temperature ?

17689. 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

17690. For a gaseous phase reaction, rate of reaction is equal to K. CA . CB. If the volume of the reactor is suddenly reduced to l/4th of its initial volume, then the rate of reaction compared to the original rate will be __________ times.

17691. In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will

17692. The equilibrium constant of a catalytic chemical reaction __________ due to the presence of a catalyst.

17693. The rate constant of a chemical reaction increases by increasing the

17694. The catalytic activity of enzymes is due to their capacity to lower the __________ energy.

17695. A first order reaction requires two unequal sized CSTR. Which of the following gives higher yield ?

17696. World Bank and IMF are

17697. The effect of increasing pressure on the gaseous equilibrium of the reaction 2X+3Y 3X+2Y indicates that

17698. 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

17699. A batch reactor is characterised by

17700. When a catalyst increases the rate of forward reaction, the value of rate constant

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