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To calculate the theoretical yield, the first essential step is to have a:

A. High percent yield
B. Known actual yield
C. Balanced chemical equation ✓
D. High temperature
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Jun 23, 2026

Which of the following factors does NOT typically lead to a lower actual yield?

A. The reaction is reversible and does not go to completion
B. Some product is lost during filtration or transfer
C. The reactants were measured perfectly and were 100% pure ✓
D. Unwanted side reactions occur
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Jun 23, 2026

In a chemical reaction, the relationship between the amounts of reactants and the maximum amount of product is called:

A. Stoichiometry ✓
B. Thermochemistry
C. Kinetics
D. Equilibrium
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Jun 23, 2026

The theoretical yield is a calculated value based on the:

A. Actual amount of product formed
B. Stoichiometry of the balanced chemical equation ✓
C. Rate of the reaction
D. Percent yield of similar reactions
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Jun 23, 2026

A percent yield greater than 100% most likely indicates:

A. The reaction was extremely efficient
B. The law of conservation of mass was violated
C. The product is impure (e.g., contains unreacted materials or water) ✓
D. The reaction created new matter
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Jun 23, 2026

The formula for calculating percent yield is:

A. (Theoretical / Actual) × 100%
B. (Actual / Theoretical) × 100% ✓
C. (Actual - Theoretical) × 100%
D. (Moles / Mass) × 100%
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Jun 23, 2026

The reactant that determines the theoretical yield of a product is the:

A. Excess reactant
B. Catalyst
C. Limiting reactant ✓
D. Solvent
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Jun 23, 2026

If the actual yield of a product is equal to its theoretical yield, the percent yield is:

A. 0%
B. 50%
C. 100% ✓
D. > 100%
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Jun 23, 2026

The actual yield of a reaction is almost always less than the theoretical yield primarily due to:

A. The law of conservation of mass
B. Incomplete reactions, side reactions, and loss of product during recovery ✓
C. The use of a catalyst
D. The high temperature of the reaction
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Jun 23, 2026

Percent yield is a measure of the ______ of a chemical reaction.

A. rate
B. efficiency ✓
C. temperature change
D. activation energy
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nmdcat.online Chemistry NMDCAT MCQs
Jun 23, 2026
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