SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Substance present at the start of a reaction
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product
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element
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matter
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reactant
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Explanation:
Detailed explanation-1: -A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products. A product is a substance that is present at the end of a chemical reaction.
Detailed explanation-2: -Reactants are the substances that are present before any chemical reaction takes place.
Detailed explanation-3: -The substance which is used up first is the limiting reagent, or the reactant (of two or more reactants) present in an amount such that it would be completely consumed if the reaction proceeded to completion. Also called limiting reactant.
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