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Chemical Reactions and Equations — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceChemical Reactions and Equations1 Mark
Question
Giving an example list two information which make a chemical equation more useful (informative).
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Answer

To make chemical equations more informative we mention: The state of the reactant and product it is either solid liquid or gas,
  • g for gases.
  • s for solids.
  • l for liquids.
  • aq for aquoas solution.
If gas we use up arrow sign and if precipitate we use down arrow sign.Example: $\text{H}_2(\text{g})\ +\ \text{O}_2(\text{g})\xrightarrow{\ \ \ \ \ \ \ \ }2\text{H}_2\text{O(I)}$

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