Engineering Questions with Answers - Multiple Choice Questions
Unit Processes MCQ’s – Equilibrium Constants and Conversions
1 - Question
What is first law of Thermodynamics called?
a) Jacob’s law
b) Fick’s law
c) Energy law
d) None of the mentioned
View Answer
Explanation: The first law of thermodynamics is: energy can neither be created nor destroyed, it transforms from one form to another.
2 - Question
Which energy a substance possesses due to motion and configuration of its atoms, molecules?
a) Potential energy
b) Kinetic energy
c) Internal energy
d) Surface energy
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Explanation: Internal energy a substance possesses due to motion and configuration of its atoms, molecules, it is due to motion and placing of particles within the structure.
3 - Question
Heat flow as a result of what?
a) Pressure difference
b) Concentration gradient
c) Temperature gradient
d) None of the mentioned
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Explanation: Heat is a form of energy that flow due to difference in temperature between the two areas or surfaces of consideration.
4 - Question
The change in enthalpy of a system is called:
a) Heat of reaction
b) Standard heat of
c) Heat absorbed
d) None of the mentioned
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Explanation: The change in enthalpy of a system when a reaction occurs, at a constant pressure is called heat of reaction.
5 - Question
What is ‘Df (delta f) :
a) Standard heat of reaction
b) Standard heat of product
c) Standard heat of combustion
d) Standard heat of formation
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Explanation: The amount of energy required to form the element is ‘Df’ called as Standard heat of formation.
6 - Question
What takes place when reactants are in excess:
a) Equilibrium
b) Forward reaction
c) Backward reaction
d) None of the mentioned
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Explanation: Forward reaction is a type of reaction where the reactants are in excess and hence the equilibrium moves forward to complete the reaction.
7 - Question
What happens in backward reaction?
a) Both reactants and products are equal
b) Reactant is in excess
c) Product is in excess
d) Needs catalyst
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Explanation: A backward reaction is a type of reaction where, the product is in more quantity, so to attain equilibrium reaction moves backward.
8 - Question
What do you mean by adiabatic reaction?
a) Constant Energy
b) Constant temperature
c) Constant Pressure
d) Constant work
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Explanation: Adiabatic reaction takes place when change in energy is zero i.e., is no change in heat and energy of the body.
9 - Question
Are Sensible heat and Latent heat same? State whether the statement is true or false.
a) True
b) False
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Explanation: Sensible heat is the amount of energy stored, whereas Latent heat is the amount of energy needed to change the state of element without any change in temperature.
10 - Question
What do you mean by Entropy?
a) dS= dq *dt
b) dS= dq/dt
c) dS= dq + dt
d) None of the mentioned
View Answer
Explanation: Entropy is defined mathematically, by differential equation relating to heat transferred in reversible process; dS= dq/dt.