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  • Question
  • Sulphuric acid is used as a catalyst in the


  • Options
  • A. hydrogenation of oils.
  • B. gas phase oxidation of SO2 in chamber process.
  • C. alkylation of hydrocarbons.
  • D. none of these.

  • Correct Answer
  • alkylation of hydrocarbons. 


  • Chemical Reaction Engineering problems


    Search Results


    • 1. Pick out the wrong statement.

    • Options
    • A. The vessel dispersion number (D/UL) for plug flow and mixed flow approaches zero and infinity respectively.
    • B. Space time in a flow reactor is a measure of its capacity and is equal to the residence time when the density of reaction mixture is constant.
    • C. Mixed reactor is always smaller than the plug flow reactor for all positive reaction orders for a particular duty.
    • D. In an ideal tubular flow reactor, mixing takes place in radial direction and there is no mixing in logitudinal direction.
    • Discuss
    • 2. The most unsuitable reactor for carrying out reactions in which high reactant concentration favours high yields is

    • Options
    • A. backmix reactor
    • B. plug flow reactor
    • C. series of CSTR
    • D. PFR in series
    • Discuss
    • 3. BET apparatus

    • Options
    • A. measures the catalyst surface area directly.
    • B. operates at very high pressure.
    • C. is made entirely of stainless steel.
    • D. none of these.
    • Discuss
    • 4. Pick out the wrong statement pertaining to space velocity of flow reactors.

    • Options
    • A. The unit of space velocity is (time)-1 .
    • B. The space velocity of 3 hr-1 means that three reactor volumes of feed at specified conditions are being fed into the reactor every hour.
    • C. The space velocity of 3 hr-1 means that one third reactor volume of feed at specified conditions are being fed into the reactor.
    • D. none of these.
    • Discuss
    • 5. Specific rate constant for a second order reaction

    • Options
    • A. is independent of temperature.
    • B. varies with temperature.
    • C. depends on the nature of the reactants.
    • D. both (b) and (c).
    • Discuss
    • 6. A reactor is generally termed as an autoclave, when it is a

    • Options
    • A. high pressure batch reactor.
    • B. atmospheric pressure tank reactor.
    • C. high pressure tubular reactor.
    • D. atmospheric pressure CSTR.
    • Discuss
    • 7. Rate of a gaseous phase reaction is given by, . The unit of rate constant is

    • Options
    • A. (atm)-1
    • B. (hr)-1
    • C. (atm)-1.(hr)-1
    • D. atm.(hr)-1
    • Discuss
    • 8. Fractional conversion __________ with increase in pressure for ammonia synthesis reaction i.e., N2 + 3H2 ⇌ 2NH3.

    • Options
    • A. increases
    • B. decreases
    • C. remains unchanged
    • D. unpredictable from the data
    • Discuss
    • 9. A catalyst

    • Options
    • A. initiates a reaction.
    • B. lowers the activation energy of reacting molecules.
    • C. is capable of reacting with any one of the reactants.
    • D. can not be recovered chemically unchanged at the end of a chemical reaction.
    • Discuss
    • 10. For the irreversible elementary reactions in parallel viz , the rate of disappearance of 'X' is equal to

    • Options
    • A. CA(K1+K2)
    • B. CA(K1 + K2)/2
    • C. CA . K1/2
    • D. CA . K2/2
    • Discuss


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