41
Pick out the wrong statement.
A)
In a first order reaction, A → products; the reaction becomes slower as it proceeds, because the concentration of A decreases and the rate is proportional to the concentration of A
B)
Transition state theory approaches the problem of calculating reaction rates by concentrating on the idea of activated complexes
C)
According to the penetration theory, the mass transfer co-efficient decreases, if the exposure time of an eddy to the solute decreases
D)
If the rate of an irreversible reaction, A + B → 2C is k.CA .CB , then the reaction is always elementary
Answer & Solution
Answer: Option
C
42
In which of the following gaseous phase reversible reactions, the product yield can not be increased by the application of high pressure?
A)
N2 + O2 ⇋ 2NO
B)
PCl3 + Cl2 ⇋ PCl5
C)
N + 3H2 ⇋ 2NH3
D)
2SO2 + O2 ⇋ 2SO3
Answer & Solution
Answer: Option
A
43
Non-catalytic fluid-solid reactions are represented by __________ model.
A)
Continuous reaction
B)
Unreacted core
C)
Both A and B
D)
Neither A and B
Answer & Solution
Answer: Option
C
44
Which of the following is the most suitable for very high pressure gas phase reaction?
A)
Batch reactor
B)
Tubular flow reactor
C)
Stirred tank reactor
D)
Fluidised bed reactor
Answer & Solution
Answer: Option
B
45
Considering the endotheomic dissociation of CaCO3 in a closed vessel (CaCO3 ⇋ CaO + CO2 ), the pressure of CO2 increases, if
A)
A catalyst is added
B)
The temperature is increased
C)
An inert gas is pumped keeping the temperature constant
D)
None of these
Answer & Solution
Answer: Option
B
46
As the chemical reaction proceeds, the rate of reaction
A)
Increases
B)
Decreases
C)
Remains same
D)
May increase or decrease depending on the type of reaction
Answer & Solution
Answer: Option
B
47
Promoter . . . . . . . .
A)
Initiates a chemical reaction and is a catalyst by itself
B)
Atlers the position of equilibrium in a reversible reaction
C)
Increases the number of active centres by increasing the unevenness of catalyst surface and by creating discontinuities in the crystals
D)
All of the above
Answer & Solution
Answer: Option
C
48
A balanced chemical reaction equation conforms to the law of
A)
Conservation of mass
B)
Avagadro's hypothesis
C)
Gaseous volumes
D)
None ofthese
Answer & Solution
Answer: Option
A
49
'N' plug flow reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for __________ order reactions.
A)
First
B)
Second
C)
Third
D)
Any
Answer & Solution
Answer: Option
D
50
In a CSTR __________ varies with time.
A)
Reaction rate
B)
Concentration
C)
Both A & B
D)
Neither A nor B
Answer & Solution
Answer: Option
D
