Chemical Process Calculation Questions and Answers – Terminology for a Reaction System-I

This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Terminology for a Reaction System-I”.

1. 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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2. 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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3-5. If 5 moles of N₂ is combined with 12 moles of H₂ as per given reaction.
N₂ + 3 H₂ → 2 NH₃
3. What is the extent of reaction?
a) 12 moles reacting
b) 8 moles reacting
c) 4 moles reacting
d) 2 moles reacting
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4. How many moles are left of N₂ in the reaction?
a) 1 mole
b) 2 moles
c) 4 moles
d) 3 moles
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5. How many moles of NH₃ are there in the reaction?
a) 1 mole
b) 2 moles
c) 4 moles
d) 8 moles
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6-9. For the given reaction
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
88 kg of C₃H₈ is reacting with 160 moles of O₂.

6. What is extent of the reaction?
a) 1 mole
b) 2 moles
d) 3 moles
c) 4 moles
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7. How many kg moles of C₃H₈ left in the reaction?
a) 1 mole
b) 2 moles
d) 3 moles
c) 4 moles
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8. How many kg of CO₂ is produced?
a) 132
b) 88
d) 44
c) 22
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9. How many kg of H₂O is produced?
a) 72
b) 36
d) 12
c) 6
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10. How many moles of O₂ are there in the reaction?
a) 0
b) 36
d) 72
c) 108
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