MCQs

11212 questions found

Practice Questions

In industrial chemistry, maximizing the ______ is a primary economic goal.

A. theoretical yield

B. number of side reactions

C. actual yield ✓

D. cost of reactants

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Jun 23, 2026

The theoretical yield assumes that ______ of the limiting reactant is converted to product.

A. 50%

B. 75%

C. 90%

D. 100% ✓

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Jun 23, 2026

A perfect reaction with no loss of product would have a percent yield of exactly:

A. 50%

B. 99%

C. 100% ✓

D. 110%

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Jun 23, 2026

The actual yield is typically given in units of:

A. Moles

B. Grams (mass) ✓

C. Percentage

D. Liters

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Jun 23, 2026

A reaction that does not go to completion will always have a percent yield that is:

A. 100%

B. Greater than 100%

C. Less than 100% ✓

D. 0%

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Jun 23, 2026

The value of the theoretical yield is independent of:

A. The amount of limiting reactant

B. The coefficients in the balanced equation

C. The efficiency of the laboratory procedure ✓

D. The molar mass of the product

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Jun 23, 2026

The “yield” of a reaction always refers to the amount of:

A. Reactant consumed

B. Product formed ✓

C. Catalyst used

D. Energy released

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nmdcat.online Chemistry NMDCAT MCQs

Jun 23, 2026

The concept of yield is most important in the field of:

A. Theoretical chemistry

B. Chemical manufacturing and synthesis ✓

C. Physical chemistry

D. Analytical chemistry

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Jun 23, 2026

A student calculates a theoretical yield of 10g but measures an actual yield of 11g. This result is:

A. Impossible

B. Possible and indicates a highly efficient reaction

C. Possible, but suggests the product is wet or contaminated with impurities ✓

D. A common result for this type of reaction

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nmdcat.online Chemistry NMDCAT MCQs

Jun 23, 2026

If the percent yield is 75%, it means the reaction produced:

A. 75% of the limiting reactant

B. 75% of the excess reactant

C. 75% of the maximum possible amount of product ✓

D. 25% of the theoretical yield

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Jun 23, 2026

The amount of product predicted by stoichiometry is the:

A. Actual yield

B. Percent yield

C. Experimental yield

D. Theoretical yield ✓

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Jun 23, 2026

Improving laboratory techniques, such as ensuring complete transfer of materials, is done to increase the:

A. Theoretical yield

B. Actual yield ✓

C. Rate of reaction

D. Activation energy

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Jun 23, 2026

The difference between the theoretical yield and the actual yield is related to the ______ of the reaction.

A. speed

B. reactants

C. products

D. inefficiency or loss ✓

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Jun 23, 2026

If a chemist aims to produce 50 g of a substance (theoretical yield) but only obtains 40 g, the 40 g represents the:

A. Percent yield

B. Actual yield ✓

C. Limiting reactant mass

D. Stoichiometric yield

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Jun 23, 2026

The actual yield must be determined by:

A. Calculation using mole ratios

B. Estimation

C. Experimentation ✓

D. Guessing

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Jun 23, 2026

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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nmdcat.online Chemistry NMDCAT MCQs

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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nmdcat.online Chemistry NMDCAT MCQs

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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nmdcat.online Chemistry NMDCAT MCQs

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

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MCQs

Practice Questions

In industrial chemistry, maximizing the ______ is a primary economic goal.

The theoretical yield assumes that ______ of the limiting reactant is converted to product.

A perfect reaction with no loss of product would have a percent yield of exactly:

The actual yield is typically given in units of:

A reaction that does not go to completion will always have a percent yield that is:

The value of the theoretical yield is independent of:

The “yield” of a reaction always refers to the amount of:

The concept of yield is most important in the field of:

A student calculates a theoretical yield of 10g but measures an actual yield of 11g. This result is:

If the percent yield is 75%, it means the reaction produced:

The amount of product predicted by stoichiometry is the:

Improving laboratory techniques, such as ensuring complete transfer of materials, is done to increase the:

The difference between the theoretical yield and the actual yield is related to the ______ of the reaction.

If a chemist aims to produce 50 g of a substance (theoretical yield) but only obtains 40 g, the 40 g represents the:

The actual yield must be determined by:

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

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

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

The theoretical yield is a calculated value based on the:

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