Engineering Questions with Answers - Multiple Choice Questions

# Chemical Industry MCQs – Inorganic Chemical – General Principles

1 - Question

Which of the mentioned deals with various forms of energy?
a) Electrochemistry
b) Thermodynamics
c) Material Sciences
d) Organic chemistry
Explanation: Thermodynamics is the study of energy (heat) transfer and its dynamics, whereas the others mentioned doesn’t deal with energy in any way.

2 - Question

“Total energy of system entering plus addition during process must equal to total energy of the system leaving” is which law of thermodynamics?
a) First law
b) Second law
c) Third law
d) None of the mentioned
Explanation: First law of thermodynamics is a version of Law of conservation of energy, which states that Total energy given to the system is used to increase the internal energy of the system and the expansion (PV) work.

3 - Question

Which of the mentioned relation is not correct?
a) A= U- TS
b) H= G+PV
c) G= H- TS
d) S = dQ/T
Explanation: Thermodynamics functions are A = U – TS, G = H-TS, S = dQ/T and H = G+PV is not the correct one.

4 - Question

Reaction kinetics deal with which of the following mentioned?
a) Study of rate of reaction
b) Study energy changes
c) Study color of compounds
d) None of the mentioned
Explanation: Kinetics is the term, which describes about the velocity. When kinetics is applied for reaction. It signifies how quick the reaction is occurring or in other terms it’s the rate of the reaction.

5 - Question

What is the overall order of the following reaction? aA + bB → R;
dCA/ dt = k . CAm. CBn
a) a + b
b) m + n
c) 1
d) 2

Explanation: The order of the reaction is defined as the index or exponent to which the concentration term in the rate equation is raised. In the above mentioned rate reaction, power of the concentration terms of reactants A and B are m and n respectively so overall order of the reaction is m+n.

6 - Question

Which of the following variables effect reaction rate?
a) Temperature
b) Pressure
c) Reactant concentration
d) All of the mentioned
Explanation: Rate of reaction depends upon factors like temperature, Pressure, Reactant concentration, Type of catalyst used etc.

7 - Question

Which of the following will come under manufacturing cost?
a) Employee benefits
b) Cafeteria
c) Operating costs
d) Freight and delivery
Explanation: Operating costs are the costs that are involved with the operation of the plant for the production activity, which comes under manufacturing costs. Other terms options mentioned Employee benefits, Cafeteria, Freight and delivery doesn’t come under manufacturing costs.

8 - Question

Specific reaction rate constant is denoted by _______
a) k
b) K
c) R
d) G
Explanation: Specific rate constant for a reaction is denoted with k. R is used to denote universal gas constant. G is used to denote Gibb’s free energy. K is used to denotes many parameters like temperature in Kelvin scale, Equilibrium rate constant etc.

9 - Question

Molecularity of the reaction aA + bB → R, -dCA/dt = k CAm CBn.
a) a + b
b) m + n
c) 1
d) 2
Explanation: Molecularity is the number of molecules that are involved in the elementary reaction or the sum of the stoichiometric coefficients of the reactants.

10 - Question

A → R → S is which type of reaction?
a) Parallel
b) Series
c) Reversible
d) Complex