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प्रश्न
What are the limitations of a chemical equation ?
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उत्तर
- It does not inform about the physical states of the reactants and the product i.e. whether they are solids, liquids and gases.
- It does not inform about the concentration of reactants and products.
- It does not inform about the time taken for the completion of the reaction.
- It does not inform about the rate at which a reaction proceeds.
- It does not inform about the heat changes during the reaction i. e. whether the heat is given out or absorbed.
- It does not inform about the conditions such as temperature, pressure, catalyst etc. which affect the reaction.
- It does not inform about the nature of the reaction i.e. whether it is reversible or irreversible.
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संबंधित प्रश्न
Why it is necessary to balance a chemical equation ?
Differentiate between:
Reactants and products.
Balance the following equation:
`Fe +O_2 → Fe_3 O_4`
Underline the incorrectly balanced compound equation and rewrite the correct equation.
\[\ce{N2 + 3H2⇌NH3}\]
Underline the incorrectly balanced compound equation and rewrite the correct equation.
\[\ce{3NH3 + H2SO4->(NH4)2SO4}\]
Balance the following important equation:
Pb(NO3)2 + NaCl → NaNO3 + PbCl2
Balance the following important equation:
Ca(HCO3)2 + HNO3 → Ca(NO3)2 + H2O + CO2
Write the balanced chemical equations for the following reactions and identify the type of reaction in each case.
- Iron (III) oxide reacts with aluminum and gives molten iron and aluminum oxide.
- Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride.
- Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.
- Ethanol is burnt in air to form carbon dioxide, water and releases heat.
A solution of potassium chloride when mixed with silver nitrate solution, an insoluble substance is formed. Write the chemical reaction involved and mention the type of the chemical reaction.
Write a balanced chemical equation of the following reaction and also classify them.
Hydrogen sulphide gas reacts with oxygen gas to form solid sulphur and liquid water.
