A limiting reactant is the one which:
Correct answer: B. Is consumed earlier and controls the amount of product formed in a chemical reaction
- A. Is mostly a cheaper substance and taken in larger quantity
- B. Is consumed earlier and controls the amount of product formed in a chemical reaction
- C. Gives greatest number of moles of products
- D. Is left behind after the completion of reaction
Explanation
Explanation: A limiting reactant is the one which is consumed earlier and controls the amount of product formed in a chemical reaction. Hence, correct option is B. This option is not correct. A limiting reactant is not mostly a cheaper substance and taken in larger quantity. This statement is also incorrect. A limiting reactant don't gives greatest number of moles of products. This statement is also incorrect. A limiting reactant does not left behind after the completion of reaction.
This question appeared on the UHS MDCAT 2009 paper, which you can sit online with every answer explained.
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About Limiting and Excess Reactants
Limiting and excess reactants are identified from the balanced chemical equation and the available amounts of each substance. The limiting reactant determines the maximum product formed, while the excess reactant remains after completion, so questions require mole ratios, theoretical yield and sometimes percentage yield calculations.
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