A. Initial concentration of the reactants remains constant
B. Free energy of activation is lower
C. Entropy changes
D. Free energy of activation is higher
Correct Answer: Free energy of activation is higher ✔
Last Updated: February 22, 2019
Related MCQs
- For an isothermal variable volume batch reactor, the following relation is applicable for a first order irreversible reaction?
- Which of the following is a characteristic of an ideal plug flow reactor ?
- 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 ?
- Collision theory gives the rate constant for bimolecular reaction as__________?
- For an ideal gas mixture undergoing a reversible gaseous phase chemical reaction, the equilibrium constant ?
- The order of the chemical reaction as shown in the bellow figure, whose rate equation is given as -rA = KCA__________?
- Maximum equilibrium conversion for endothermic reaction is obtained at the __________ temperature?
- A space velocity of 5 hr-1 means that __________?
- 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)) ?
- For the non catalytic reaction of particles with surrounding fluid, the same needed to achieve the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the __________ is the controlling resistance?
- For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases __________ times?
- Which of the following resistances is not involved in a gas phase catalytic (gas-solid) reaction ?
- The minimum energy required to allow a chemical reaction to proceed is termed as the ‘threshold energy ‘. Chemical reactions with low activation energy are __________?
- A liquid decomposes by irreversible first order kinetics and the half life period of this reaction is 8 minutes. The time required for 75% conversion of the liquid will be __________ minutes?
- Fluidised bed reactor is characterized by__________?
- Velocity of a chemical reaction__________?
- Shift conversion reaction__________?
- The conversion for a second order, irreversible reaction (constant volume) as shown in the bellow figure, in batch mode is given by__________?
- Find a mechanism that is consistent with the rate equation and reaction given below ?
- In a semi-batch reactor __________?
- The catalytic converter for conversion of SO2 to SO3 by contact process should have a feed with SO2 content between__________?
- For a first order chemical reaction in a porous catalyst, the Thiele modulus is 10. The effectiveness factor is approximately equal to __________?
- The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of „E/R’ is __________?
- Most important characteristics of gas-liquid reactors are the__________?
- The reaction between oxygen and organic material is a/an __________ reaction?
- Which of the following is not a theory of homogeneous reaction ?
- 6 gm of carbon is burnt with an amount of air containing 18 gm oxygen. The product contains 16.5 gms CO2 and 2.8 gms CO besides other constituents. What is the degree of conversion on the basis of disappearance of limiting reactant ?
- A first order reaction requires two equal sized CSTR. The conversion is__________?
- The optimum performance for reactors operating in parallel is obtained when the feed stream is distributed in such a way, that the__________?
- 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’ ?
- Higher free energy of activation of a chemical reaction (at a given temperature) implies __________?
- As the chemical reaction proceeds, the rate of reaction __________?
- Integral method for analysing the kinetic data is used __________?
- A pulse tracer is introduced in an ideal CSTR (with a mean residence time I) at time, t = 0. The time taken for the exit concentration of the tracer to reach half of its initial value will be__________?
- Inversion of cane sugar is an example of __________?
- A typical example of an exothermic reversible reaction conducted at high pressure in industry is__________?
- Reaction rate of a first order reaction, which is half completed in 23 minutes will be __________?
- The reaction in which the rate equation corresponds to a stoichiometric equation, is called a/an __________ reaction?
- Chemical kinetics can predict the __________ of a chemical reaction?
- A reaction which is catalysed by an acid is also catalysed by any substance, which has a tendency to __________?
- The reactions with low activation energy are __________?
- Rate of an autocatalytic chemical reaction is a function of __________?
- Oil is hydrogenated using nickel catalyst in a __________ reactor?
- The reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction?
- Which of the following is not endothermic in nature ?
- Differential method for analysing the kinetic data is used __________?
- For a tubular flow reactor with uniform concentration and temperature, the independent variable is__________?
- In chamber process of sulphuric acid manufacture in industry, the gas phase oxidation of SO2 to SO3 is accomplished by a __________ reaction ?
- The catalyst in a first order chemical reaction changes the__________?
- For a tubular reactor with space time ‘η’ and residence time ‘ζ’, the following statement holds good ?
- Kinetics of a solid catalysed reaction can best be studied in a __________ reactor?