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प्रश्न
What are the ways by which a chemical equation can be made more informative ?
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उत्तर
A chemical equation can give more information in the following ways:
- The physical state of the reactants and products can be indicated by putting (s) for solid, (l) for liquid, (g) for gas and (aq) for aqueous state.
- Evolution or absorption of heat during the reaction can be denoted by adding or subtracting a heat term on the product side.
- Temperature, pressure and catalyst can be indicated above the arrow (→ or =) separating the reactants and products.
- Concentration of reactants and products is indicated by adding word (dil) for dilute and (conc) for concentrated before their formulae.
- By the sign \[\ce{-> or <=>}\] information about irreversible and reversible reactions can be obtained.
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संबंधित प्रश्न
Balance the following equation:
`Pb_3 O_4 → PbO+O_2`
Balance the following equation. Also name the products formed.
`CO _2 + C → CO`
Balance the following equation:
\[\ce{ZnS + O2->ZnO + SO2}\]
Underline the incorrectly balanced compound equation and rewrite the correct equation.
\[\ce{4P + 4O2->2P2O5}\]
Balance the following important equation:
NH3 + O2 → N2 + H2O (burning of NH3)
A chemical reaction does not involve:
Which of the following are combination reactions?
- `2"KClO"_3 overset("Heat")(->) 2"KCl" + 3"O"_2`
- `"MgO" + "H"_2"O" -> "Mg"("OH")_2`
- `4"Al" + 3"O"_2 -> 2"Al"_2"O"_3`
- `"Zn" + "FeSO"_4 -> "ZnSO"_4 + "Fe"`
Write a balanced chemical equation of the following reaction and also classify them.
Lead acetate solution is treated with dilute hydrochloric acid to form lead chloride and acetic acid solution.
What happens when a piece of
- zinc metal is added to copper sulphate solution?
- aluminium metal is added to dilute hydrochloric acid?
- silver metal is added to copper sulphate solution?
Also write the balanced chemical equation if the reaction occurs.
Complete and balance the following equation:
\[\ce{C2H4Br2 + alcoholic KOH ->[\Delta]}\]
