Related Questions

Which of the following gases has very high neutron capture cross-section, making it unsuitable as a coolant in nuclear reactor?
A N2
B He
C CO2
D H2
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
A Zero
B One
C Two
D Three
In case of a __________ reactor, the composition in the reactor and at the exit of the reactor is the same.
A Semi-batch
B Tubular
C Batch
D Back-mix
Sellling 12 pen at a price of Tk 10 yields a loss of a% Selling 12 pen at a price of Tk 12 yields a profit of a%. What is the value of a?
A 10
B 11
C 10011
D 11100
If n = overall order of a chemical reaction. a = initial concentration of reactant. t = time required to complete a definite fraction of the reaction. Then pick out the correct relationship.
A $${\text{t}} \propto \frac{1}{{{{\text{a}}^{\text{n}}}}}$$
B $${\text{t}} \propto \frac{1}{{{{\text{a}}^{{\text{n}} - 1}}}}$$
C $${\text{t}} \propto \frac{1}{{{{\text{a}}^{{\text{n}} + 1}}}}$$
D $${\text{t}} \propto {{\text{a}}^{\text{n}}}$$
High temperature in gasification of coal favours
A High production of CO2
B Low production of CO2
C High production of CO
D Both B and C
The most suitable reactor for carrying out an auto-thermal reaction is a
A Batch reactor
B CSTR
C Semi-batch reactor
D Plug-flow reactor
A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant)
A $$ \propto {\text{CA}}$$
B $$ \propto \frac{1}{{{\text{CA}}}}$$
C Independent of temperature
D None of these
For a first order chemical reaction, the concentration of the reactant decreases __________ with time.
A Linearly
B Exponentially
C Logarithmically
D Inversely
Half-life period for a first order reaction is __________ the initial concentration of the reactant.
A Directly proportional to
B Inversely proportional to
C Independent of
D None of these

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