Question 31 : In case of __________ reactions, the reaction rate does not decrease appreciably as the reaction proceeds.
1. parallel
2. series
3. catalytic
4. auto catalytic
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Question 32 : The units of frequency factor in Arhenious equation
1. depend on temperature, pressure etc. of the reaction.
2. are the same as those of the rate constant.
3. are cycles per unit time.
4. depend on the order of the reaction.
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Question 33 : For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a __________ reactor.
1. stirred tank
2. fixed bed
3. tubular flow
4. batch
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Question 34 : In a/an __________ reactor, there is exchange of heat with the surroundings with sizeable temperature variation.
1. isothermal
2. adiabatic
3. non-adiabatic
4. none of these.
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Question 35 : Which of the following is not a chemical step in a fluid solid catalytic reaction ?
1. Adsorption
2. Surface chemical reaction
3. None of these
4. Desorption
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Question 36 : A photochemical reaction is __________ light.
1. accompanied with emission of
2. catalysed by
3. used to convert heat energy into
4. initiated by
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Question 37 : If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion.
1. film
2. ash layer
3. pore
4. none of these
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Question 38 : Unreacted core model' represents the reaction involving
1. manufacture of carbon disulphide from elements.
2. combustion of coal particles.
3. none of these.
4. roasting of sulphide ores.
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Question 39 : Conversion increases with increase in temperature in case of a an __________ reaction.
1. reversible endothermic
2. irreversible
3. autocatalytic
4. reversible exothermic
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Question 40 : Which of the following will favour the reverse reaction in a chemical equilibrium reaction ?
1. Increasing the concentration of one of the reactants.
2. Removal of at least one of the products at regular interval.
3. Increasing the concentration of one or more of the products.
4. None of these.
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