Related Questions

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
A More
B Less
C Same
D Either A or B, depends on other factors
The time needed to achieve the same fractional conversion for particles of different sizes (d) when chemical reaction controls, is proportional to
A d
B $$\sqrt {\text{d}} $$
C d1.5
D d2
For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the __________ is the controlling resistance.
A Film diffusion
B Diffusion through ash layer
C Chemical reaction
D Either A, B or C
If the time required for half change is inversely proportional to the square of initial concentration and the velocity depends on the units in which the concentration term is expressed, then the order of reaction is
A 1
B 2
C 3
D 0
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
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 $${\text{t}} \propto {{\text{a}}^{\text{n}}}$$
What is the order of a chemical reaction in which doubling the initial concentration of the reactants doubles the half life time of the reaction?
A 0
B 1
C 2
D 3
With an increase in pressure in gaseous phase chemical reactions, the fractional conversion __________ when the number of moles decreases.
A Increases
B Decreases
C Remains unaffected
D Unpredictable from the data
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.
A Film diffusion
B Diffusion through ash layer
C Chemical reaction
D Either A, B or C
Fractional conversion __________ for an exothermic reversible chemical reaction, when the temperature is maximum.
A Increases
B Remains unchanged
C Decreases
D Unpredictable from the data

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