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Chemical Reaction

The rate at which a chemical substance reacts is proportional to its _____________________?

August 23, 2021February 23, 2019 by admin
The rate at which a chemical substance reacts is proportional to its _____________________?

A. Active mass
B. Molecular weight
C. Equivalent weight
D. Atomic weight

Categories Chemical Reaction

Which of the following is the most suitable for isothermal operation?

August 23, 2021February 23, 2019 by admin
Which of the following is the most suitable for isothermal operation?

A. Batch reactor
B. Back-mix reactor
C. Plug-flow reactor
D. Fixed bed reactor

Categories Chemical Reaction

An exothermic reaction takes place in an adiabatic reactor. The product temperature ______________ reactor feed temperature?

August 23, 2021February 23, 2019 by admin
An exothermic reaction takes place in an adiabatic reactor. The product temperature ______________ reactor feed temperature?

A. Is always equal to
B. Is always greater than
C. Is always less than
D. May be greater or less than

Categories Chemical Reaction

The rate of forward reaction, at chemical equilibrium is ______________ the rate of backward reaction?

August 23, 2021February 23, 2019 by admin
The rate of forward reaction, at chemical equilibrium is ______________ the rate of backward reaction?

A. More than
B. Less than
C. Equal to
D. Either B. or C.

Categories Chemical Reaction

For a first order chemical reaction, the rate constant_________________?

August 23, 2021February 23, 2019 by admin
For a first order chemical reaction, the rate constant_________________?

A. Changes on changing the concentration units
B. Is not a function of the unit of time
C. Has unit of time-1
D. None of these

Categories Chemical Reaction

When the reaction occurs in the diffusion controlled region, the apparent activation energy as measured is only _______________ the true value?

August 23, 2021February 23, 2019 by admin
When the reaction occurs in the diffusion controlled region, the apparent activation energy as measured is only _______________ the true value?

A. Twice
B. Half
C. Equal
D. None of these

Categories Chemical Reaction

Reverse reaction in a chemical equilibrium is favoured by the________________?

August 23, 2021February 23, 2019 by admin
Reverse reaction in a chemical equilibrium is favoured by the________________?

A. Removal of one of the products regularly
B. Increase in the concentration of one of the products
C. Increase in the concentration of one of the reactants
D. None of these

Categories Chemical Reaction

With increase in temperature, the equilibrium _______________ rises in case of endothermic reaction?

August 23, 2021February 23, 2019 by admin
With increase in temperature, the equilibrium _______________ rises in case of endothermic reaction?

A. Constant
B. Conversion
C. Both A. & B.
D. Neither A. nor B.

Categories Chemical Reaction

What is the unit of the rate constant in a chemical reaction in which 10% of the reactant decomposes in one hour, 20% in two hours, 30% in three hours and so on ?

August 23, 2021February 23, 2019 by admin
What is the unit of the rate constant in a chemical reaction in which 10% of the reactant decomposes in one hour, 20% in two hours, 30% in three hours and so on ?

A. Litre/mole.second
B. Moles/litre.second
C. Litre/mole
D. Litre/second

Categories Chemical Reaction

Which of the following is an autocatalytic reaction ?

August 23, 2021February 23, 2019 by admin
Which of the following is an autocatalytic reaction ?

A. Photochemical reactions
B. Microbial fermentation reaction
C. Enzyme fermentation reaction
D. Ammonia synthesis reaction

Categories Chemical Reaction
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