31251. The rate constant of a chemical reaction increases by increasing the
31252. The catalytic activity of enzymes is due to their capacity to lower the __________ energy.
31253. A first order reaction requires two unequal sized CSTR. Which of the following gives higher yield ?
31254. World Bank and IMF are
31255. The effect of increasing pressure on the gaseous equilibrium of the reaction 2X+3Y 3X+2Y indicates that
31256. If in the gaseous phase reaction, N2O4 2NO2, x is the part of N2O4 which dissociates, then the number of molecules at equilibrium will be
31257. A batch reactor is characterised by
31258. When a catalyst increases the rate of forward reaction, the value of rate constant
31259. Rate determining step in a reaction consisting of a number of steps in series is the __________ step.
31260. The rate of a chemical reaction is almost doubled for every 10°C rise in temperature. The rate will increase __________ times, if the temperature rises form 10 to 100°C.
31261. A catalyst in a chemical reaction __________ free energy change in the reaction.
31262. Signal normally used to study non-ideal flow by stimulus response technique is __________ input.
31263. When all the limiting reactant is consumed in the reaction, the operational yield __________ the relative yield.
31264. The half life period of a first order reaction is
31265. The catalyst in a second order reversible reaction increases the rate of the forward reaction
31266. Catalyst carriers
31267. For the liquid phase zero order irreversible reaction A B, the conversion of A in a CSTR is found to be 0.3 at a space velocity of 0.1min-1 . What will be the conversion for a PFR with a space velocity of 0.2 min-1? Assume that all the other operating conditions are the same for CSTR and PFR.
31268. A high space velocity means that a given
31269. In flow reactors, the performance equations interrelate the rate of reaction to the
31270. Space velocity
31271. The rate of the chemical reaction A B doubles as the concentration of A i.e.., CA is doubled. If rate of reaction is proportional to CAn, then what is the value of n for this reaction ?
31272. A reaction which is catalysed by a base is catalysed by all substances which have a tendency to
31273. For a homogeneous reaction of nth order, the dimension of the rate constant is given by
31274. The fractional volume change between no conversion and complete conversion, for the isothermal gas phase reaction, 2A R, is
31275. The reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction.
31276. A typical example of an exothermic reversible reaction conducted at high pressure in industry is
31277. Study of chemical kinetics is the easiest in the case of __________ reactions.
31278. In autocatalytic reactions,
31279. Semibatch reactor is preferred, when a/an
31280. Exposure of a photographic plate to produce a latent image is an example of __________ reaction.
31281. For identical flow rate, feed composition and for elementary first order reactions, 'N' equal sized mixed reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for constant density systems. This is true, when the value of 'N' is
31282. Helium-mercury method is used for the measurement of the __________ of the catalyst.
31283. What is the order of a chemical reaction whose rate is deter-mined by the variation of one concentration term only ?
31284. Which schedule of Bank Balance Sheet deals with Reserves?
31285. The rate at which a chemical substance reacts is proportional to its
31286. The exit age distribution of a fluid leaving a vessel (denoted by E) is used to study the extent of non-ideal flow in the vessel. The value of is
31287. A plug-flow reactor is characterised by
31288. 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.
31289. For a tubular reactor with space time 'τ' and residence time 'θ', the following statement holds good.
31290. Rate of an autocatalytic chemical reaction is a function of
31291. Which of the following curves shows the effect of temperature on the extent of gas-solid adsorption at a given pressure ?
31292. For an ideal mixed flow reactor (CSTR), the exit age distribution E(t) is given by
31293. Fluid flow in a real packed bed can be approximated as __________ model.
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