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Q.5 With reference to a chemical equation, state which of the statements 1 to 5 pertain to
A: Information provided by a chemical equation. B: Limitations of a chemical
10. PbO2
1.
The nature of the individual elements.
2.
The speed of the reaction.
3.
The state of matter in which the substance is present.
4.
The completion of the reaction.
5. The direction of the reaction.
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Answer 1

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Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

Log burning in a fire. Burning wood is an example of a chemical reaction in which wood in the presence of heat and oxygen is transformed into carbon dioxide, water vapour, and ash.