Q.1
For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of
Q.2
The increase in the rate of reaction with temperature is due to
Q.3
Reaction of benzene with chlorine gas to produce tri-chlorobenzene exemplifies a/an __________ reaction.
Q.4
Which of the following factors control the design of a fluid-solid reactor?
Q.5
Pick out the wrong statement.
Q.6
If CA is the quantity of reactants initially present, the quantity left after 'n' half periods will be equal to
Q.7
Pick out the correct statement.
Q.8
Cold shot cooling is only practical when the feed temperature is __________ than the reaction temperature.
Q.9
The optimum performance for reactors operating in parallel is obtained when the feed stream is distributed in such a way, that the
Q.10
Effectiveness factor (E) of a catalyst pellet is defined as, E = (actual rate within pore of catalyst/rate if notsnowed by pore diffusion) Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus)
Q.11
Photochemical reaction rate does not depend significantly on temperature, because
Q.12
A chemical reaction occurs when the energy of the reacting molecules is __________ the activation energy of the reaction.
Q.13
BET apparatus
Q.14
Which of the following is the most suitable for isothermal operation?
Q.15
Rate of a chemical reaction is not influenced by the
Q.16
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.
Q.17
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.
Q.18
Molecularity of an elementary reaction, P + Q → R + S is
Q.19
A high space velocity means that a given
Q.20
Thermodynamic equilibrium constant in a system is affected by
Q.21
For the reversible reaction A ⇋ 2B, if the equilibrium constant K is 0.05 mole/litre; starting from initially 2 moles of A and zero moles of B, how many moles will be formed at equilibrium?
Q.22
With an increase in pressure in gaseous phase chemical reactions, the fractional conversion __________ when the number of moles decreases.
Q.23
Half life period of a chemical reaction is proportional to CA0-1 , if the reaction is of __________ order.
Q.24
A photochemical reaction is
Q.25
A rise in temperature
Q.26
The fractional volume change between no conversion and complete conversion, for the isothermal gas phase reaction, 2A → R, is
Q.27
A catalyst in a chemical reaction
Q.28
With increase in temperature, the rate constant obeying Arhenious equation
Q.29
A backmix reactor
Q.30
For reaction, P + 2 → 3R, molar rate of consumption of P is
Q.31
If pore diffusion is the controlling step in a solid catalysed reaction, the catalyst
Q.32
Oil is hydrogenated using nickel catalyst in a __________ reactor.
Q.33
A back mix reactor is
Q.34
A batch reactor is
Q.35
A first order irreversible reaction, A → B is carried out separately in a constant volume as well as in a variable volume reactor for a particular period. It signifies that __________ in the two reactors.
Q.36
When all the limiting reactant is consumed in the reaction, the operational yield __________ the relative yield.
Q.37
An exothermic reaction takes place in an adiabatic reactor. The product temperature __________ reactor feed temperature.
Q.38
Bulk diffusion in catalyst pore __________ with increase in pressure.
Q.39
The unit of frequency factor in Arhenious equation is
Q.40
The rate of reaction of a/an __________ reaction is not affected by temperature rise.
Q.41
For a first order chemical reaction, the rate constant
Q.42
Pick out the wrong statement pertaining to space velocity of flow reactors.
Q.43
A first order reaction A → B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by
Q.44
For a __________ order reaction, the units of rate constant and rate of reaction are the same.
Q.45
A catalyst
Q.46
Exposure of a photographic plate to produce a latent image is an example of __________ reaction.
Q.47
An autothermal reactor is
Q.48
A Catalyst
Q.49
A catalyst promoter
Q.50
For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is
0 h : 0 m : 1 s