126. For a zero order reaction, the concentration of product increases with the
127. Effectiveness factor of a catalyst pellet is a measure of the __________ resistance.
128. The rate expression for a heterogenous catalytic reaction is given by, - rA = K.KA PA(1 + KA.PA + KR.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A)
129. Given,
3H2 + CO = CH4 + H2O, KP = 101.84 and,
4H2 + CO2 = CH4 + 2H2O, KP = 101.17
the KP for the reaction CO + H2O = CO2 + H2 is
130. Differential method for analysing the kinetic data is used
131. In case of the irreversible unimolecular type, first order reaction, the fractional conversion at any time for constant volume system as compared to variable volume system is
132. The reaction in which the rate equation corresponds to a stoichiometric equation, is called a/an __________ reaction.
133. 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
134. A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by
135. Arrhenious equation represents graphically the variation between the __________ and temperature.
136. __________ catalytic reaction is involved in the thermal cracking of gas oil.
137. Variables affecting the rate of homogeneous reactions are
138. A chemical reaction occurs when the energy of the reacting molecules is __________ the activation energy of the reaction.
139. Which of the following resistances is not involved in a gas phase catalytic (gas-solid) reaction ?
140. If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is
141. A batch adiabatic reactor at an initial temperature of 373°K is being used for the reaction, A B. Assume the heat of reaction is - 1kJ/mole at 373°K and heat capacity of both A and B to be constant and equal to 50J/mole.K. The temperature rise after a conversion of 0.5 will be
142. The National Stock Exchange of India is located at?
143. A photochemical reaction is
144. Which is the most prevalent form of unemployment in India?
145. The optimum performance for reactors operating in parallel is obtained when the feed stream is distributed in such a way, that the
146. A catalyst is said to be a negative catalyst, ifit
147. For the non catalytic reaction of particles with surrounding fluid, the same needed to achive the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the __________ is the controlling resistance.
148. Pure ethanol vapor is fed to a reactor packed with alumina catalyst, at the rate of 100 kmole / hr. The reactor products comprise: ethylene :95 kmole / hr, water vapour: 97.5 k mole / hr and diethyl ether :2.5 kmole/hr. The reactions occuring can be represented by:
C2H5OH C2H4 + H2O
2C2H5OH C2H5 - O - C2H5 + H2O
The percent conversion of ethanol in the reactor is
149. ‘Princes of Wales Cup’ is associated with the game of .........?