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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

  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

  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

  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.

  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

  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.

  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

  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

  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

  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.