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Chemical Reaction Quiz 8

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Chemical Reaction Quiz 8

1 / 50

The reaction A ? B is conducted in an isothermal batch reactor. If the conversion of A increases linearly with holding time, then the order of the reaction is ___________?

2 / 50

The synthesis of proteins and metabolism in biological objects occur in the presence of biocatalyst called__________?

3 / 50

The use of space time is preferred over the mean residence time in the design of a/an______?

4 / 50

The response curve for a step input signal from a reactor is called C-curve. The variance of C-curve in a ?tanks in series model? comprising of ?m? tanks is equal to _____?

5 / 50

Velocity of a reaction depends upon the__________?

6 / 50

The reaction rate almost gets doubled for 10?C rise in temperature. This is due to the fact that the__________?

7 / 50

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_________?

8 / 50

When a high liquid hold up is required in a reactor for gas liquid reaction, use _______ column?

9 / 50

When all the limiting reactant is consumed in the reaction, the operational yield ________ the relative yield?

10 / 50

The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is _______ that of mixed reactor?

11 / 50

Velocity of a chemical reaction_____?

12 / 50

The unit of frequency factor in Arrhenius equation is________?

13 / 50

The units of frequency factor in Arrhenius equation__________?

14 / 50

What is the order of a chemical reaction of the bellow figure, if the rate of formation of ?C?, increases by a factor of 2.82 on doubling the concentration of ?A? and increases by a factor of 9 on trebling the concentration of ?B? ?

15 / 50

The reaction in which the rate equation corresponds to a stoichiometric equation, is called a/an ________ reaction?

16 / 50

The reaction between oxygen and organic material is a/an ______ reaction?

17 / 50

The reactions with low activation energy are _______?

18 / 50

The role of a catalyst in a chemical reaction is to change the___________?

19 / 50

The value of Steric factor ?P? in the equation k = PZeE/RT usually ranges from ________?

20 / 50

The temperature dependence of reaction rate constant (K) by Arrhenius law is given by________?

21 / 50

Transition state theory gives the rate constant as___________?

22 / 50

What is the order of chemical reaction as shown in the bellow figure, if it is found that the reaction rate doubles on doubling the concentration of B and also the reaction rate doubles when the concentrations of both A & B were doubled and quadrupled when the concentrations of both B & C were doubled ?

23 / 50

The value of ?n? for a chemical reaction A ? B, whose reaction rate is ? CA n, will be ________ if the rate of the reaction increases by a factor of 8, when the concentration of is doubled?

24 / 50

Three plug flow reactors (PFR?s) of 4, 5 & 6 m3 volumes are arranged in two branches as shown below in the figure. If the total feed rate is 300 tons/hr, then for the same conversion in each branch, the feed rate through branch II should be _______ tons/hr ?

25 / 50

What is the dispersion number for a plug flow reactor ?

26 / 50

The vessel dispersion number (D/?L) for plug flow is__________?

27 / 50

Volume change for unimolecular type first order reaction as shown in the bellow figure, increases ______ with time?

28 / 50

Transition state theory relates the above quantities as_____?

29 / 50

When a catalyst increases the rate of chemical reaction, the rate constant_______?

30 / 50

The single parameter model proposed for describing non-ideal flow is the _____ model?

31 / 50

The space time is equivalent to the holding time in a steady state mixed reactor for_______?

32 / 50

The reaction rate constants at two different temperatures T1 and T2 are related by __________?

33 / 50

What is the unit of the rate constant in a chemical reaction in which 10% of the reactant decomposes in one hour, 20% in two hours, 30% in three hours and so on ?

34 / 50

When a catalyst increases the rate of forward reaction, the value of rate constant___________?

35 / 50

Time required for 50% decomposition of a liquid in an isothermal batch reactor following first order kinetics is 2 minutes. The time required for 75% decomposition will be about ________ minutes?

36 / 50

The reason why a catalyst increases the rate of reaction is that, it_______?

37 / 50

The reactions of high molecularity are rare, because_________?

38 / 50

What is the value of ?n? if the reaction rate of the chemical reaction A ? B, is proportional to CA n and it is found that the reaction rate triples, when the concentration of ?A? is increased 9 times ?

39 / 50

What is the order of a chemical reaction in which doubling the initial concentration of the reactants doubles the half life time of the reaction ?

40 / 50

Threshold energy in a reaction is equal to the__________?

41 / 50

The reaction A ? B is conducted in an adiabatic plug flow reactor (PFR). Pure A at a concentration of 2 kmol/m3is fed to the reactor at the rate of 0.01 m3 /s and at a temperature of 500 K. If the exit conversion is 20%, then the exit temperature (in k) is (Data: Heat of reaction at 298 K = ? 50000 kJ/ kmole of A reacted Heat capacities CPA = CPB = 100kJ/kmole. K (may be assumed to be independent of temperature)) ?

42 / 50

The residence time distribution of an ideal CSTR is _______?

43 / 50

Vegetable oils are hydrogenated in a ________ reactor?

44 / 50

Thermodynamic equilibrium constant in a system is affected by_____?

45 / 50

There is no correspondence between stoichiometric and the rate equation in case of a/an ______ reaction?

46 / 50

The sequence in which three CSTR?s of volumes 5, 10 and 15 m3 will be connected in series to obtain the maximum production in a second order irreversible reaction is ______?

47 / 50

What is the order of a chemical reaction whose rate is deter-mined by the variation of one concentration term only ?

48 / 50

The reaction in which one of the products of reaction acts as a catalyst is called a/an _______ reaction?

49 / 50

What is the dispersion number for a CSTR ?

50 / 50

Variables affecting the rate of homogeneous reactions are_____?

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