Chemical Reaction Archives - Page 43 of 44 -

Rate of a chemical reaction is not affected by the____________________?

Rate of a chemical reaction is not affected by the____________________?

A. Catalyst
B. Temperature
C. Reactant’s concentration
D. Number of molecules of reactants taking part in the reaction

Rate of a chemical reaction is not affected by the____________________? Read More »

Chemical Reaction

On application of pressure to the equilibrium system, ice ⇌ water; which of the following phenomenon will occur ?

Chemical Reaction / admin

On application of pressure to the equilibrium system, ice ⇌ water; which of the following phenomenon will occur ?

A. Water will evaporate
B. Equilibrium will not be attained
C. More ice will be formed
D. More water will be formed

On application of pressure to the equilibrium system, ice ⇌ water; which of the following phenomenon will occur ? Read More »

Chemical Reaction

B.E.T. method can be used to determine the ___________________ of a porous catalyst?

Chemical Reaction / admin

B.E.T. method can be used to determine the ___________________ of a porous catalyst?

A. Solid density
B. Pore volume
C. Surface area
D. All A., B. and C.

B.E.T. method can be used to determine the ___________________ of a porous catalyst? Read More »

Chemical Reaction

In an exothermic reaction, the energy of the reacting substances as compared to that of products is____________________?

Chemical Reaction / admin

In an exothermic reaction, the energy of the reacting substances as compared to that of products is____________________?

A. More
B. Less
C. Same
D. Either A. or B., depends on order of reaction

In an exothermic reaction, the energy of the reacting substances as compared to that of products is____________________? Read More »

Chemical Reaction

Semibatch reactor is preferred, when a/an__________________?

Chemical Reaction / admin

Semibatch reactor is preferred, when a/an__________________?

A. A highly exothermic reaction is to be controlled
B. Undesirable side reaction (at high concentration of one of the reactants) is to be avoided
C. A gas is to be reacted with liquid (e.g. hydrogenation of fat)
D. All A., B., and C.

Semibatch reactor is preferred, when a/an__________________? Read More »

Chemical Reaction

The half life period ‘t’ of a zero order reaction as shown in the bellow figure, is equal to_________________?

Chemical Reaction / admin

The half life period ‘t’ of a zero order reaction as shown in the bellow figure, is equal to_________________?

A. CA0/2K
B. CA0/K
C. 0.693/K
D. 1/K

The half life period ‘t’ of a zero order reaction as shown in the bellow figure, is equal to_________________? Read More »

Chemical Reaction

If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the ________________ diffusion?

Chemical Reaction / admin

If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the ________________ diffusion?

A. Film
B. Ash layer
C. Pore
D. None of these

If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the ________________ diffusion? Read More »

Chemical Reaction

Variables affecting the rate of homogeneous reactions are___________________?

Chemical Reaction / admin

Variables affecting the rate of homogeneous reactions are___________________?

A. Pressure and temperature only
B. Temperature and composition only
C. Pressure and composition only
D. Pressure, temperature and composition

Variables affecting the rate of homogeneous reactions are___________________? Read More »

Chemical Reaction

In a zero order reaction, reactants concentration does not change with time and the_________________?

Chemical Reaction / admin

In a zero order reaction, reactants concentration does not change with time and the_________________?

A. Time for half change is half the time taken for completion of the reaction
B. Time for half change is independent of the initial concentration
C. Time for completion of the reaction is independent of the initial concentration
D. Reaction rate is trebled when the initial concentration is trebled

In a zero order reaction, reactants concentration does not change with time and the_________________? Read More »

Chemical Reaction

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___________________?

Chemical Reaction / admin

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

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___________________? Read More »

Chemical Reaction