E-PolyLearning

1. Which of the following does the concept of material balance based upon?
a. Conservation of mass
b. Conservation of energy
c. Conservation of momentum
d. Conservation of Volume
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Answer: (a).Conservation of mass

2. The equation of material balance, (Final condition + Sum of outputs) is equal to which of the following?
a. Initial condition – Sum of inputs
b. Initial condition + Sum of inputs
c. Sum of inputs – Initial condition
d. None of the mentioned
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Answer: (b).Initial condition + Sum of inputs

3. A container has 10 grams of water 5 grams of water is added and 2 grams of water is taken out, what is the final amount of water?
a. 7 grams
b. 10 grams
c. 13 grams
d. 15 grams
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Answer: (c).13 grams

4. 10 moles of O₂ is added to 10 moles of H₂, how many moles of H₂O will it produce?
a. 5
b. 10
c. 15
d. 20
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Answer: (b).10

5. A combustion reaction has reactants 1 mole of CxHy and 2 moles of O₂ and products 1 mole of CO₂ and 2 mole of H₂O, what is x + y?
a. 1
b. 3
c. 4
d. 5
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Answer: (d).5

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