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
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
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
d) None of the mentioned
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
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
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
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
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
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
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