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Chemical Engineering :: Chemical Reaction Engineering

  1. Reactions with high activation energy are

  2. A.
    very temperature sensitive
    B.
    temperature insensitive
    C.
    always irreversible
    D.
    always reversible

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  3. If n = overall order of a chemical reaction. a = initial concentration of reactant. t = time required to complete a definite fraction of the reaction. Then pick out the correct relationship.

  4. A.
    B.
    C.
    D.
    tan

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  5. In case of a/an __________ chemical reaction, conversion increases with the rise in temperature.

  6. A.
    reversible exothermic
    B.
    irreversible exothermic
    C.
    irreversible endothermic
    D.
    reversible endothermic

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  7. A space velocity of 5 hr-1 means that

  8. A.
    five reactor volumes of feed (at specified conditions) are being fed into the reactor per hour.
    B.
    after every 5 hours, reactor is being filled with the feed.
    C.
    cent per cent conversion can be achieved in at least 5 hours.
    D.
    a fixed conversion of a given batch of feed takes 5 hours.

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  9. With increase in initial concentration, the fractional conversion of a first order reaction in a given time

  10. A.
    increases
    B.
    decreases
    C.
    remains constant
    D.
    unpredictable

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  11. The rate of reaction of a/an __________ reaction is not affected by temperature rise.

  12. A.
    autocatalytic
    B.
    photochemical
    C.
    consecutive
    D.
    zero order.

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  13. With an increase in pressure in gaseous phase chemical reactions, the fractional conversion __________ when the number of moles decreases.

  14. A.
    increases
    B.
    decreases
    C.
    remains unaffected
    D.
    unpredictable from the data

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  15. Half-life period for a first order reaction is __________ the initial concentration of the reactant.

  16. A.
    directly proportional to
    B.
    inversely proportional to
    C.
    independent of
    D.
    none of these

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  17. Carbon particles accummulated on the catalyst used in the gas oil cracking lies in the category of __________ poison.

  18. A.
    deposited
    B.
    chemisorbed
    C.
    selectivity
    D.
    stability

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  19. The decomposition of A into B is represented by the exothermic reaction, A 2B. To achieve maximum decomposition, it is desirable to carry out the reaction.

  20. A.
    at high P and high T.
    B.
    at low P and high T.
    C.
    at low P and low T.
    D.
    at high P and low T.

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