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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 2051. |
The reactant with the smallest maximum extent of reaction is the ___________ reactant.(a) Excess(b) Limiting(c) Neither excess nor limiting(d) None of the mentioned |
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Answer» Correct option is (b) Limiting Explanation: The reactant with the smallest maximum extent of reaction is the limiting reactant. |
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| 2052. |
Extent of a reaction denotes(a) Total number of moles reacting in a reaction(b) How much a reaction is occurring?(c) Number of moles of a reactant that react in a reaction(d) None of the mentioned |
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Answer» Correct choice is (b) How much a reaction is occurring? The best explanation: It denotes that how much a reaction occurs. |
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| 2053. |
How much kg of H2O is required as per reaction extent?(a) 18(b) 36(c) 54(d) 72 |
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Answer» Right option is (b) 36 Easy explanation: Kg of H2O required= 2*18 = 36. |
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| 2054. |
A fluid enters system at the rate of 10 liters/s and leaves in two pathways one with 7 liters/s, then what type of flow it is?(a) Steady-state(b) Unsteady-state(c) Cannot say(d) None of the mentioned |
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Answer» Right answer is (b) Unsteady-state The best I can explain: Since the flow in rate and flow out rate of the fluid are not equal, the system is in Unsteady-state. |
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| 2055. |
How many Kgs of SO2 are produced in the reaction?(a) 5.632(b) 4.632(c) 3.632(d) 2.632 |
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Answer» The correct choice is (a) 5.632 For explanation: Produced Kgs of SO2 = 8*(Extent of the reaction)*64. |
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| 2056. |
All reactants other than limiting reactant are(a) Excess reactant(b) Other reactants(c) Extent reactant(d) None of the mentioned |
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Answer» Correct option is (a) Excess reactant Best explanation: All reactants other than limiting reactant are called excess reactant. |
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| 2057. |
How many Kgs of NaOH is there in the reactor?(a) 101.5 Kg(b) 202.5 Kg(c) 303.5 Kg(d) 404.5 Kg |
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Answer» The correct answer is (b) 202.5 Kg The explanation is: Mass balance for NaOH. |
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| 2058. |
For producing 6 mole of H2O, how many Kgs of Glucose is required?(a) 180(b) 360(c) 540(d) 720 |
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Answer» The correct choice is (a) 180 The best I can explain: 1 mole of Glucose = 6 moles of H2O. |
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| 2059. |
For producing 4 gram moles of HNO3, how many grams of NO2 are required?(a) 274(b) 275(c) 276(d) 277 |
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Answer» Correct answer is (c) 276 The explanation: 3 gram mole of NO2 = 2 gram moles of HNO3. |
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| 2060. |
The unit of extent of a reaction is(a) Unit-less(b) Moles reacting(c) Kg reacting(d) None of the mentioned |
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Answer» Correct choice is (b) Moles reacting Best explanation: The unit of extent of a reaction is Moles reacting. |
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| 2061. |
If the kg amount of both the reactants is doubled. What is the extent of the reaction?(a) 2(b) 4(c) 6(d) 8 |
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Answer» The correct choice is (a) 2 To explain I would say: If we double the kg amount of reactant, we double the moles. The extent becomes double. |
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| 2062. |
How many moles of H2SO4 are there in the bucket?(a) 1.44(b) 1.88(c) 2.44(d) 2.88 |
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Answer» The correct answer is (b) 1.88 Best explanation: Number of moles = mass / molecular weight. |
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| 2063. |
How many moles of H2 are there in the bucket?(a) 3(b) 6(c) 10(d) 12 |
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Answer» The correct choice is (c) 10 Best explanation: Moles of H2 = Moles of H2 in (2 Moles of C2H4+ 2 Moles of H2O + 1 Mole of C3H8). |
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| 2064. |
How many moles of H2O are there in the bucket?(a) 1(b) 2(c) 4(d) 6 |
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Answer» Right option is (b) 2 The explanation is: Number of moles = mass / molecular weight. |
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| 2065. |
How many moles of C3H8 are there in the bucket?(a) 1(b) 2(c) 4(d) 6 |
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Answer» The correct choice is (a) 1 To explain: Number of moles = mass / molecular weight. |
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| 2066. |
How many Kgs of H2O is there in the reactor?(a) 100 Kg(b) 200 Kg(c) 300 Kg(d) 400 Kg |
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Answer» Right answer is (a) 100 Kg Easy explanation: Mass balance for H2O. |
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| 2067. |
What is the extent of reaction if 10 moles of NO2 are produced inthe reaction?(a) 5(b) 10(c) 15(d) 20 |
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Answer» Correct choice is (a) 5 The explanation is: Extent of reaction = (10 – 0)/2 = 5. |
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| 2068. |
How many moles of Hydrogen are there in the bucket?(a) 11.00(b) 11.16(c) 11.56(d) 11.98 |
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Answer» Right option is (b) 11.16 For explanation I would say: Moles of H = Moles of NaOH + 2(Moles of H2O) + 2(Moles of H2SO4). |
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| 2069. |
How much CO2 in kg can be produced with 1 mole of CH4? (Consider O2 is in excess)(a) 44(b) 88(c) 132(d) 176 |
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Answer» Correct choice is (a) 44 Easy explanation: 1 mole of CH4 is equivalent to 1 moles of CO2. |
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| 2070. |
How much CO2 in kg can be produced with 1 mole of C4H10? (Consider O2 is in excess)(a) 44(b) 88(c) 132(d) 176 |
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Answer» The correct answer is (d) 176 The explanation is: 1 mole of C4H10 is equivalent to 4 moles of CO2. |
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| 2071. |
What is the extent of reaction if 10 moles of O2 is required for the reaction?(a) 5(b) 10(c) 15(d) 20 |
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Answer» The correct choice is (a) 5 Best explanation: Extent of reaction = (10 – 0)/2 = 5. |
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| 2072. |
How many moles of O2 are there when the reaction completes?(a) 0(b) 2(c) 4(d) 6 |
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Answer» The correct option is (a) 0 The explanation is: Moles left = Initial mole – extent of the reaction*stoichiometric coefficient. |
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| 2073. |
How many moles of O2 are required for producing 10 moles of H2O? (Consider C4H10 is in excess)(a) 6.5(b) 13(c) 15(d) 30 |
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Answer» The correct choice is (b) 13 To explain I would say: 6.5 mole of O2 is equivalent to 5 moles of H2O. |
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| 2074. |
How many moles of O2 are required for the reaction?(a) 121(b) 11(c) 144(d) 12 |
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Answer» Correct option is (a) 121 The best I can explain: Required moles of O2 = 11(Extent of the reaction). |
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| 2075. |
For producing 10 moles of H2O, how many moles of C4H10 are required? (Consider O2 is in excess)(a) 1(b) 2(c) 5(d) 10 |
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Answer» The correct choice is (b) 2 Best explanation: 1 mole of C4H10 is equivalent to 2 moles of H2O. |
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| 2076. |
What is the ratio of Hydrogen to the Pentane in the feed?(a) 1.167(b) 2.167(c) 3.167(d) 4.167 |
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Answer» Correct choice is (b) 2.167 Explanation: Ratio = 104/48 = 2.167. |
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| 2077. |
How many moles of CO2 produced in the reaction?(a) 5(b) 6(c) 7(d) 8 |
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Answer» Correct option is (a) 5 Easiest explanation: Moles produced = extent of the reaction*Stoichiometric coefficient. |
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| 2078. |
How many moles of O2 are there in the cylinder?(a) 1(b) 2(c) 4(d) 6 |
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Answer» Correct choice is (b) 2 Easy explanation: Number of moles = mass / molecular weight. |
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| 2079. |
What is the number of moles of NH3 after the reaction?(a) 10(b) 15(c) 20(d) None of the mentioned |
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Answer» Right answer is (c) 20 Explanation: Moles of NH3 = 2(Extent of the reaction). |
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| 2080. |
_____________ is the number of moles of a particular substance in a mixtures or solution divided by the total number of moles present in the mixture or solution.(a) Molecular weight(b) Average molecular weight(c) Atomic weight(d) Mole fraction |
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Answer» Right answer is (d) Mole fraction Best explanation: Mole fraction is the number of moles of a particular substance in a mixtures or solution divided by the total number of moles present in the mixture or solution. |
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| 2081. |
Work is a ______________ variable.(a) Path(b) State(c) Neither Path nor State(d) None of the mentioned |
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Answer» The correct choice is (a) Path For explanation I would say: Work is a Path variable. |
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| 2082. |
The heat of formation as ______ in the standard state for each stable element.(a) Zero(b) Cannot be calculated(c) Negative(d) positive |
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Answer» Right answer is (a) Zero Easiest explanation: The heat of formation as Zero in the standard state for each stable element. |
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| 2083. |
All the gases resulting from a combustion process, not including the water vapour is known as(a) Flue gas(b) Stack gas(c) Orsat analysis(d) None of the mentioned |
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Answer» Right answer is (c) Orsat analysis For explanation: All the gases resulting from a combustion process, not including the water vapour is known as Orsat analysis. |
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| 2084. |
The amount of air required to be brought in to the process for complete combustion is(a) Theoretical Air(b) Excess Air(c) Partial Air(d) None of the mentioned |
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Answer» The correct choice is (a) Theoretical Air For explanation: The amount of air required to be brought in to the process for complete combustion is called Theoretical Air. |
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| 2085. |
Which one is the excess reactant?(a) N2(b) H2(c) Both N2 and H2(d) Neither N2 nor H2 |
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Answer» Right option is (b) H2 To elaborate: H2 has higher extent of reaction. |
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| 2086. |
How many moles of Ne are there in the cylinder?(a) 1(b) 2(c) 4(d) 6 |
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Answer» Correct option is (b) 2 Explanation: Number of moles = mass / molecular weight. |
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| 2087. |
What is the percentage by weight of Nitrogen in NH3?(a) 82.35(b) 83.40(c) 88.12(d) 94.56 |
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Answer» Right answer is (a) 82.35 Best explanation: Percentage by weight = mass of the component / Total mass. |
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| 2088. |
What is the mole fraction of Ne?(a) 0.2(b) 0.4(c) 0.6(d) 0.8 |
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Answer» Correct answer is (b) 0.4 The explanation is: Mole fraction = Moles of the component / Total moles. |
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| 2089. |
What is the weight percentage of NaOH?(a) 14.67(b) 15.67(c) 16.67(d) 17.67 |
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Answer» The correct option is (c) 16.67 Easy explanation: Weight percentage = mass of the component / Total mass. |
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| 2090. |
When Heat is gained by the system(a) Q < 0(b) Q > 0(c) Q = 0(d) None of the mentioned |
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Answer» Right choice is (b) Q > 0 To explain: Heat transferred from the surrounding, T2-T1> 0 so Q > 0. |
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| 2091. |
Mechanical form of energy is(a) Work(b) Kinetic energy(c) Potential energy(d) All of the mentioned |
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Answer» Right answer is (d) All of the mentioned Best explanation: Work, Kinetic energy and Potential energy, all are the form of Mechanical energy. |
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| 2092. |
______________is a process in which material is neither added nor removed from a process during operation.(a) Continuous process(b) Batch process(c) Semi-batch process(d) None of the mentioned |
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Answer» Correct choice is (b) Batch process Easiest explanation: Batch process is a process in which material is neither added nor removed from a process during operation. |
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| 2093. |
In the given tank, there are two feeds and one output. Consider a 2 hour operation; the feed rates are 4000 kg/hr and 6000 kg/hr. The accumulated material inside the tank is 2000 kg. What is the output rate kg/hr of the material?(a) 9000(b) 8000(c) 7000(d) 6000 |
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Answer» The correct answer is (a) 9000 Explanation: Input = output, Take a basis: 2 hour. |
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| 2094. |
All the gases resulting from a combustion process including the water vapour is known as(a) Flue gas(b) Dry basis(c) Orsat analysis(d) None of the mentioned |
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Answer» The correct answer is (a) Flue gas To explain: All the gases resulting from a combustion process including the water vapour is known as flue gas. |
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| 2095. |
The total energy of the block _________ in every operation.(a) Increases(b) Decreases(c) Remains constant(d) None of the mentioned |
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Answer» Right choice is (c) Remains constant Easiest explanation: The total energy of the block constant in every operation. |
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| 2096. |
What is weight percentage of Ne?(a) 0.225(b) 0.425(c) 0.625(d) 0.825 |
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Answer» The correct answer is (c) 0.625 To explain I would say: Weight percentage = mass of the component / Total mass. |
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| 2097. |
What is the mass of the block?(a) 99.36 Kg(b) 9.996 Kg(c) 0.9936 Kg(d) None of the mentioned |
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Answer» Right answer is (c) 0.9936 Kg The best explanation: Mass = density*Volume. |
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| 2098. |
The specific gravity of water is taken as(a) 0.01(b) 0.1(c) 1(d) 10 |
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Answer» Correct answer is (c) 1 The explanation is: While measuring the specific gravity of liquids, it is measured with respect to water. |
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| 2099. |
Material balance equation cannot be applied to(a) Total moles(b) Mass of an atomic species(c) Moles of an atomic species(d) All of the mentioned |
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Answer» Right choice is (a) Total moles The best explanation: Total moles may vary. |
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| 2100. |
Material balance equation can be applied to(a) Total mass(b) Mass of a component(c) Moles of a component(d) All of the mentioned |
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Answer» The correct answer is (d) All of the mentioned Best explanation: Material balance equation can be applied to all these as these are conserved under every change in a chemical process. |
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