Chemical Reaction Engineering Quiz | Chemical Reaction Engineering Multiple Choice Questions(MCQs) & Answers

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Questions
1 For the hydrolysis of methyl acetate in presence of acids
A the order of reaction is 1 and molecularity is 2
B the order of reaction is 2 and molecularity is 2
C the order of reaction is 2 and molecularity is 1
D the order of reaction is 1 and molecularity is 1

Answer: the order of reaction is 1 and molecularity is 2
2 The excess energy of the reactants required to dissociates into products is known as
A activation energy
B binding energy
C threshold energy
D thermal energy

Answer: activation energy
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3 A reaction which proceeds with evolution of heat is called
A thermo-nuclear reaction
B endothermic reaction
C exothermic reaction
D photochemical reaction

Answer: exothermic reaction
4 A reaction which proceeds with absorption of heat is termed as
A exothermic reaction
B endothermic reaction
C thermo-chemical reaction
D photochemical reaction

Answer: endothermic reaction
5 Which of the following is a catalytic reaction?
A Synthesis of water by passing electric sparks through a mixture of hydrogen and oxygen
B Neutralization of a dilute alkali solution by a small amount of a conentrated acid
C Hydrolysis of an ester in the presence of H+
D Darkening of silver halides in light

Answer: Hydrolysis of an ester in the presence of H+
6 The formation of water from H2(g) and O2(g) is an exothermic reaction because
A H2(g) and O2(g) have a higher chemical energy than water
B H2(g) and O2(g) have a higher temperature than water
C H2(g) and O2(g) have a lower chemical energy than water
D energy considerations do not arise

Answer: H2(g) and O2(g) have a higher chemical energy than water
7 An exothermic reaction is that in which the reacting substances
A have more energy than the products
B have less energy than the products
C have as much energy as the products
D are at a higher temperature than the products

Answer: have more energy than the products
8 The reaction between organic material and oxygen is
A an endothermic reaction
B an exothermic reaction
C a photochemical reaction
D a biochemical reaction

Answer: an exothermic reaction
9 The rates of purely photochemical reactions do not depend on temperature to any significant extent because
A they are exothermic reactions
B they are endothermic reactions
C the energy of the reacting molecules exceeds the activation energy by absorption of light
D they are reversible reactions

Answer: the energy of the reacting molecules exceeds the activation energy by absorption of light
10 Plants manufacture carbohydrates from the carbon dioxide of the atmosphere by
A oxidation
B polymerization
C condensation with water
D a photochemical reaction

Answer: a photochemical reaction
11 A photochemical reaction is
A catalysed by light
B initiated by light
C accompanied with emission of light
D used to convert heat energy into light

Answer: initiated by light
12 Reaction between neutral solution of barium chloride and sodium carbonate goes to completion because
A the reaction is irreversible
B sodium chloride is only sparingly soluble in water
C barium carbonate is almost insoluble in water
D the solubility of BaCI2 decreases in the presence of sodium carbonate

Answer: barium carbonate is almost insoluble in water
13 The reaction CH2 = CH2 + Br2 ?? CH2 Br ?CH2Br is
A a substitution reaction
B an addition reaction
C a molecular rearrangement
D a photochemical reaction

Answer: an addition reaction
14 A chemical reaction occurs when the energy of the reacting molecules is
A less than the activation energy of the reaction
B equal to the activation energy of the reaction
C more than the activation energy of the reaction
D equal to or more than the activation energy of the reaction

Answer: equal to or more than the activation energy of the reaction
15 The symbolic representation of the molecule of a compound is called
A structural formula
B molecular formula
C empirical formula
D graphic formula

Answer: molecular formula
16 Chemical reactions involve the participation of
A electrons
B protons
C neutrons
D nuclei

Answer: electrons
17 When a correctly written chemical equation is balanced
A the number of atoms of each kind on each side should be equal
B all molecules are diatomic
C all substances are in the same physical state
D the sum of the coefficient on both sides is the same

Answer: the number of atoms of each kind on each side should be equal
18 An imbalanced equation is against the
A law of gaseous volumes
B law of constant proportions
C law of conservation of mass
D law of multiple proportions

Answer: law of conservation of mass
19 A balanced chemical equation is in accordance with
A law of gaseous volumes
B law of Avogadro
C law of constant proportions
D law of conservation of mass

Answer: law of conservation of mass
20 Which one of the following statements about a chemical equation is true?
A Mass is conserved
B Mass as well as atoms are conserved
C Atoms are conserved
D Ions are conserved

Answer: Mass as well as atoms are conserved

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