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Month: February 2019

Conversion increases with increase in temperature in case of a/an ______________ reaction?

August 23, 2021February 23, 2019 by admin
Conversion increases with increase in temperature in case of a/an ______________ reaction?

A. Autocatalytic
B. Irreversible
C. Reversible endothermic
D. Reversible exothermic

Categories Chemical Reaction

Considering the endothermic dissociation of CaCO3 in a closed vessel (CaCO3 ⇌ CaO + CO2), the pressure of CO2 increases, if____________________?

August 23, 2021February 23, 2019 by admin
Considering the endothermic 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 keeg the temperature constant
D. None of these

Categories Chemical Reaction

Thermodynamic equilibrium constant in a system is affected by___________________?

August 23, 2021February 23, 2019 by admin
Thermodynamic equilibrium constant in a system is affected by___________________?

A. Inerts
B. Pressure
C. Temperature
D. All A., B. & C.

Categories Chemical Reaction

Sum of the powers of the concentration terms in the rate equation is called the _____________ of the reaction?

August 23, 2021February 23, 2019 by admin
Sum of the powers of the concentration terms in the rate equation is called the _____________ of the reaction?

A. Order
B. Overall order
C. Molecularity
D. None of these

Categories 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
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