A. Conservation of mass
B. Avogadro’s hypothesis
C. Gaseous volumes
D. None of these
Correct Answer: Conservation of mass ✔
Last Updated: February 24, 2019
Related MCQs
- Enzymes (a protein) are catalysts found in organisms. Its efficiency of catalysing a reaction is due to its capacity to lower the activation energy of the reaction. The enzyme ptyalin used for food digestion is present in __________?
- Which of the following chemical reactions will be favoured by low pressure ?
- An isothermal aqueous phase reversible reaction, P ⇌ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m3 .h is given by, r = 0.5CP – 0.125CR. A stream containing only P enters the reactor. The residence time required (in hours) for 40% conversion of P is__________?
- Pick out the wrong statement ?
- The performance of a cascade of CSTR’s can be improved by adding__________?
- According to Arrhenius equation of temperature dependency of rate constant for an elementary reaction __________?
- When the reaction is dominated by intraparticle diffusion, the apparent order of reaction (nD) as measured is related to the true order (n) as __________?
- The equilibrium constant for the reversible reaction as shown in the bellow figure, is affected by the__________?
- . In the converter of the contact process for the manufacture of H2SO4 the equilibrium conversion of SO2 (i) with increase in temperature and (ii) __________ with increase in the mole ratio of SO2 to air?
- Consider the ‘n’ th order irreversible liquid phase reaction A → B. Which one of the following plots involving half life of the reaction (t1/2) and the initial reactant concentration (CA0) gives a straight line plot ?
- In a reaction, the threshold energy is equal to (where, A = activation energy N = normal energy of reactants) ?
- A trickle bed reactor is the one, which__________?
- The rate of reaction of a/an __________ reaction is not affected by temperature rise ?
- The energy balance equation over a tubular reactor under transient conditions is__________?
- Exothermic reactions are best carried out in __________?
- The experimentally determined overall order of the reaction, A + B → C + D, is two. Then the__________?
- Backmixing is most predominant in__________?
- For the chemical reaction X → Y, it is observed that, on doubling the concentration of ‘X’, the reaction rate quadruples. If the reaction rate is proportional to Cx n, then what is the value of „n‟ ?
- An endothermic second order reaction is carried out in an adiabatic plug flow reactor. The rate of heat generation is __________?
- 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 ?
- The excess energy of the reactants required to dissociate into products is known as the __________ energy?
- The knowledge of initial concentration and rate constant is necessary to determine the half life time of a reaction of __________ order?
- An endothermic aqueous phase first order irreversible reaction is carried out in an adiabatic plug flow reactor. The rate of reaction ?
- Which of the following factors control the deactivation of a porous catalyst pellet?
- Carbon particles accumulated on the catalyst used in the gas oil cracking lies in the category of __________ poison?
- For an ideal plug flow reactor, the value of Peclet number is__________?
- In a reversible reaction, a catalyst increases the rate of forward reaction__________?
- In an ideal mixed reactor (at steady state), the __________?
- The importance of diffusion in a catalyst are increased by __________?
- A gaseous reactant is introduced in a mixed reactor of 3 litres volume at the rate of 1 litre/second. The space time is __________ seconds?
- With increase in initial concentration, the fractional conversion of a first order reaction in a given time__________?
- The molecularity and the order of reaction respectively, for the hydrolysis of methyl acetate in presence of acids are__________?
- Which one is the rate controlling step in a solid-gas non-catalytic reaction occurring at very high temperature ?
- The temperature dependence of reaction rate constant (K) by Arrhenius law is given by__________?
- In solid catalysed reactions the diffusional effects are more likely to affect the overall rate of reaction for__________?
- Half-life period for a first order reaction is __________ the initial concentration of the reactant?
- Recycling back of outlet stream to the reactor from an ideal CSTR carrying out a first order liquid phase reaction will result in __________ in conversion?
- In case of a __________ reactor, the composition in the reactor and at the exit of the reactor is the same ?
- Catalytic action in a catalytic chemical reaction follows from the ability of catalyst to change the __________?
- Reaction of benzene with chlorine gas to produce tri-chlorobenzene exemplifies a/an __________ reaction?
- The eddy diffusivity for a liquid in plug flow must be__________?
- In which of the following gaseous phase reversible reactions, the product yield cannot be increased by the application of high pressure ?
- In a/an __________ vessel, the fluid enters and leaves following plug flow?
- If the pore diffusion controls in a catalytic reaction, the apparent activation energy Ea is equal to__________?
- When an exothermic reversible reaction is conducted adiabatically, the rate of reaction__________?
- Reactions with high activation energy are__________?
- The conversion in a mixed reactor/accomplishing a reaction A → 3R is 50% when gaseous reactant ‘A’ is introduced at the rate of 1 litre/second and the leaving flow rate is 2 litres/second. The holding time for this operation is __________ second?
- A Catalyst __________?
- For a mixed flow reactor operating at steady state, the rate of reaction is given by__________?
- With increase in the order of reaction (for all positive reaction orders), the ratio of the volume of mixed reactor to the volume of plug flow reactor (for identical feed composition, flow rate and conversion)?
- The rate of the heterogeneous catalytic reaction A(g) + B(g) → C(g) is given by -rA = k.KA.pA.PB/(1 + KA.PA + Kc.pc), where KA and Kc are the adsorption equilibrium constants. The rate controlling step for this reaction is__________?