This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Limiting and Excess Reactant-II”.
1. All reactants other than limiting reactant are
a) Excess reactant
b) Other reactants
c) Extent reactant
d) None of the mentioned
View Answer
Explanation: All reactants other than limiting reactant are called excess reactant.
2. ___________ reactant in a chemical reaction is that would theoretically run out first if the reaction were to proceed to completion according to the chemical equation , even if the reaction did not take place.
a) Excess
b) Limiting
c) Both excess and limiting
d) None of the mentioned
View Answer
Explanation: Limiting reactant in a chemical reaction is that would theoretically run out first if the reaction were to proceed to completion according to the chemical equation , even if the reaction did not take place.
3. 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
View Answer
Explanation: The reactant with the smallest maximum extent of reaction is the limiting reactant.
4. CH4 is burned in the presence of oxygen. If there are 5 moles of each component present, which one is the limiting reactant?
a) CH4
b) O2
c) Both CH4 and O2
d) Neither CH4 nor O2
View Answer
Explanation: The required moles of O2 is lesser with respect to CH4.
5. CH4 is burned in the presence of oxygen. If there are 5 moles of each component present, which one is the excess reactant?
a) CH4
b) O2
c) Both CH4 and O2
d) Neither CH4 nor O2
View Answer
Explanation: The required moles of CH4 are greater in comparison to O2.
6. In the reaction 2 Al + 3 CuCl2 → 2 AlCl3 + 3 Cu, how many moles of Al will react with 2.46 moles of CuCl2?
a) 1.64 moles
b) 3.28 mole
c) 3.69 mole
d) 2.46 mole
View Answer
Explanation: 2 moles of Al react with 3 moles of CuCl2, so for 2.46 moles of CuCl2, 1.64 moles of Al will be needed.
7. In the reaction 2 Al + 3 CuCl2 → 2 AlCl3 + 3 Cu, if the feed contains 3 moles of each component, which one is the limiting reactant?
a) Al
b) CuCl2
c) Neither Al nor CuCl2
d) None of the mentioned
View Answer
Explanation: CuCl2 has fewer moles compared to Al, making it the limiting reactant.
8. In the reaction 2 Al + 3 CuCl2 → 2 AlCl3 + 3 Cu, if the feed contains 5 moles of each component, which one is the excess reactant?
a) Al
b) CuCl2
c) Neither Al nor CuCl2
d) None of the mentioned
View Answer
Explanation: CuCl2 has fewer moles compared to Al, making Al the excess reactant.
9. In the reaction N2 + 3 H2 → 2 NH3, if the feed contains x moles of N2 and y moles of H2, what condition must hold for N2 to be the limiting reactant?
a) x = y
b) 3x < y
c) x > y
d) 3x > y
View Answer
Explanation: For N2 to be the limiting reactant, 3x must be less than y.
10. In the reaction N2 + 3 H2 → 2 NH3, if the feed contains x moles of N2 and y moles of H2, what condition must hold for N2 to be the excess reactant?
a) x = y
b) 3x > y
c) x < y
d) 3x < y
View Answer
Explanation: For N2 to be the excess reactant, 3x must be greater than y.
Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
To practice all areas of Chemical Process Calculation, here is complete set of 1000+ Multiple Choice Questions and Answers.
