SCIENCE
RESPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Substances present at the beginning of a chemical reaction
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substances present at the end of a chemical reaction
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Either A or B
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None of the above
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Detailed explanation-1: -The substance(s) to the left of the arrow in a chemical equation are called reactants. 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 substances that start a chemical reaction, and products are substances produced in the reaction. A chemical reaction can be represented by the general chemical formula:Reactants → Products. Bonds break and reform during chemical reactions. The reaction also occurs in the opposite direction.
Detailed explanation-3: -In a chemical reaction the reactants (what you start with) are converted into products (what you end with). The reactants, which are shown on the left hand side of an equation, and the products, which are shown of the right, are separated by an arrow.