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प्रश्न
Differentiate between a ‘word equation’ and a ‘molecular equation’ with a suitable example.
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उत्तर
Word equation tells which substances react (take part) in the chemical reaction and which substances are produced whereas molecular equation symbols and molecular formulas are used for both reactants and products.
Example: When zinc reacts with dilute sulphuric acid, both being reactants, products produced are zinc sulphate and hydrogen gas, which are shown as below:
Word equation:
\[\ce{Zinc + Sulphuric acid->Zinc sulphate + hydrogen}\]
Molecular equation:
\[\ce{\underset{\text{Zinc}}{Zn}+\underset{\text{[Sulphuric acid]}}{H2SO4(dil)}->\underset{\text{[Zinc sulphate]}}{ZnSo4}+\underset{\text{[Hydrogen]}}{H2[g]}}\]
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संबंधित प्रश्न
Write a balanced chemical equation with state symbols for the following reaction.
Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.
What information do you get from the following chemical equation:
Zn(s) + 2HCl (dil) → ZnCl2 (aq) + H2(g)
Balance the following equation:
`Fe +O_2 → Fe_3 O_4`
Balance the following equation:
\[\ce{Fe2O3 + H2->Fe + H2O}\]
Balance the following equation:
\[\ce{Pb3O4->PbO + O2}\]
Balance the following important equation:
(NH4)2SO4 + NaOH → Na2SO4 + H2O + NH3
A teacher gave two test tubes to the students, one containing water and the other containing sodium hydroxide. She asked them to identify the test tube containing sodium hydroxide solution. Which one of the following can be used for identification?
When ferrous sulphate is heated strongly it undergoes decomposition to form ferric oxide as a main product accompanied by a change in colour from:
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.
Mention any two information conveyed by a balanced chemical equation.
