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Practice Questions

If the percent yield for a reaction is 90% and a student needs to produce 27 g of product, they should aim for a theoretical yield of:

A. 24.3 g
B. 27 g
C. 30 g ✓
D. 90 g
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Jun 23, 2026

A reaction has a theoretical yield of 88 g. If its percent yield is 75%, the actual yield is:

A. 117.3 g
B. 88 g
C. 75 g
D. 66 g ✓
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nmdcat.online Chemistry NMDCAT MCQs
Jun 23, 2026

If the percent yield is 85% and the theoretical yield is 200 g, the actual yield is:

A. 85 g
B. 170 g ✓
C. 200 g
D. 235 g
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nmdcat.online Chemistry NMDCAT MCQs
Jun 23, 2026

A reaction has an actual yield of 35 g and a theoretical yield of 40 g. Its percent yield is:

A. 80%
B. 87.50% ✓
C. 90%
D. 114%
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nmdcat.online Chemistry NMDCAT MCQs
Jun 23, 2026

When 1 mole of N₂ reacts with 3 moles of H₂, the theoretical yield of NH₃ is 34 g. If 17 g is produced, the percent yield is:

A. 17%
B. 34%
C. 50% ✓
D. 100%
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Jun 23, 2026

A chemist expects to get 150 g of aspirin but only gets 120 g. The percent yield is:

A. 75%
B. 80% ✓
C. 90%
D. 125%
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nmdcat.online Chemistry NMDCAT MCQs
Jun 23, 2026

If the actual yield is 2.5 g and the percent yield is 50%, the theoretical yield must be:

A. 1.25 g
B. 2.5 g
C. 5.0 g ✓
D. 10.0 g
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nmdcat.online Chemistry NMDCAT MCQs
Jun 23, 2026

The percent yield of a reaction that starts with 10g of reactant and produces 8g of product can only be calculated if the ______ is known.

A. excess reactant
B. rate of reaction
C. theoretical yield ✓
D. actual yield
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nmdcat.online Chemistry NMDCAT MCQs
Jun 23, 2026

The reaction of excess C₂H₄ with 64g of O₂ should produce 88g of CO₂. If 66g of CO₂ is obtained, the percent yield is:

A. 50%
B. 66%
C. 75% ✓
D. 88%
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nmdcat.online Chemistry NMDCAT MCQs
Jun 23, 2026

If 16g of CH₄ (1 mol) produces 36g of H₂O (actual yield), and the theoretical yield is 36g, the percent yield is:

A. 50%
B. 75%
C. 90%
D. 100% ✓
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nmdcat.online Chemistry NMDCAT MCQs
Jun 23, 2026
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