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Practice Questions

A reaction with a theoretical yield of 5.0 g has a percent yield of 60%. The mass of product obtained is:

A. 3.0 g ✓
B. 5.0 g
C. 6.0 g
D. 8.3 g
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Jun 23, 2026

Given 2Na + Cl₂ → 2NaCl, 46g of Na theoretically yields 117g of NaCl. If the actual yield is 100g, the percent yield is about:

A. 85.50% ✓
B. 90%
C. 117%
D. 75%
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Jun 23, 2026

The percent yield is 90% and the actual yield is 18 g. The theoretical yield is:

A. 16.2 g
B. 18 g
C. 20 g ✓
D. 90 g
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Jun 23, 2026

The reaction of 24 g of Mg (1 mole) produces 30 g of MgO. The theoretical yield is 40 g. The percent yield is:

A. 60%
B. 75% ✓
C. 80%
D. 133%
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Jun 23, 2026

If 3 moles of H₂ are supposed to produce 2 moles of NH₃, but only 1.5 moles are formed, the percent yield is:

A. 50%
B. 66.70%
C. 75% ✓
D. 150%
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Jun 23, 2026

The decomposition of 100 g of CaCO₃ (theoretical yield of CaO is 56 g) produces 50 g of CaO. The percent yield is approximately:

A. 50%
B. 56%
C. 89% ✓
D. 112%
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nmdcat.online Chemistry NMDCAT MCQs
Jun 23, 2026

A reaction of 12 g of carbon should produce 44 g of CO₂. If 33 g of CO₂ is produced, the percent yield is:

A. 50%
B. 66.70%
C. 75% ✓
D. 80%
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nmdcat.online Chemistry NMDCAT MCQs
Jun 23, 2026

A student calculates a theoretical yield of 8.0 g. Their actual yield is 6.0 g. The percent yield is:

A. 60%
B. 80%
C. 133%
D. 75% ✓
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nmdcat.online Chemistry NMDCAT MCQs
Jun 23, 2026

In the reaction 2H₂ + O₂ → 2H₂O, 4g of H₂ produces 30g of H₂O. The theoretical yield is 36g. The percent yield is:

A. 83.30% ✓
B. 90%
C. 120%
D. 75%
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nmdcat.online Chemistry NMDCAT MCQs
Jun 23, 2026

The theoretical yield of a reaction is 25 g and its percent yield is 80%. The actual yield is:

A. 25 g
B. 20 g ✓
C. 31.25 g
D. 80 g
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nmdcat.online Chemistry NMDCAT MCQs
Jun 23, 2026
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