Question 11 : Propane is burnt with 20% excess O₂, what is the percentage of CO₂ in products?
1. 12.5%
2. 25%
3. 45%
4. 75.5%
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Question 12 : Pentane is burnt with 100% of excess air, what is the percentage of H₂O in the products?
1. 12.4%
2. 34.6%
3. 42.1%
4. 56.9%
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Question 13 : Ethene is burnt with 150% of excess air, what is the percentage of O₂ in the products?
1. 12.5%
2. 33.3%
3. 45.4%
4. 52.9%
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Question 14 : Ethene is burnt with 50% of excess air, what is the percentage of CO₂ in the products?
1. 11.11%
2. 36.36%
3. 66.66%
4. 72.72%
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Question 15 : 144 grams of C₅H₁₂ is burnt with 64 grams O₂, and 44 grams of CO₂ is formed, what is the percentage of excess O₂?
1. 25%
2. 50%
3. 75%
4. 100%
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Question 16 : The extent of a reaction is 10, and the stoichiometric coefficient of O₂ is 2.5, if the moles of O₂ entering the process is 45, what is the percentage of excess air?
1. 20%
2. 40%
3. 60%
4. 80%
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Question 17 : 10 moles of ethane is supplied with 49 moles of oxygen, what is the percentage of excess oxygen?
1. 20%
2. 40%
3. 50%
4. 70%
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Question 18 : What is the percentage of excess air if 50 grams of air is in excess and 150 grams of air enters the process?
1. 10%
2. 25%
3. 50%
4. 100%
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Question 19 : What is the percentage of excess air, if 10 moles of air entered the process and only 5 moles of that are required?
1. 10%
2. 50%
3. 75%
4. 100%
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Question 20 : A reactor is supplied with 2 streams both at the rate 5 mole, one has 40% Cl₂ and 60% N2, and another has pure C₂H₆, if the product has C₂H₅Cl, HCl and N₂ at the rate 20 mole, what is the percentage of HCl in products?
1. 10%
2. 15%
3. 25%
4. 30%
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