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प्रश्न
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.
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उत्तर
| (a) | `"Fe"_2"O"_3("s") + 2"Al"("s") ->"Al"_2` | Displacement reaction / Redox reaction |
| (b) | `3"Mg"("s") + "N"_2("g") -> "Mg"_3"N"_2 ("s")` | Combination reaction |
| (c) | `2"KI"("aq") + "Cl"_2("g") + "Cl"_2("g") -> 2"KCl"("aq") + "I"_2("s");` | Displacement reaction |
| (d) | `"C"_2"H"_5"OH"("l") + 3"O"_2("g") -> 2"CO"_2("g") + 3"H"_2"O"("l") + "Heat"; ` | Redox reaction/ Combustion reaction |
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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.
Balance the following equation:
Na2O + H2O → NaOH
Balance the following equation:
Zn + HCI → ZnCI2 + H2
State four conditions necessary for a chemical reaction to take place.
Balance the following equation. Also name the products formed.
`NaNO_3→ NaNO_2 + O_2 ` Name of product (s)
State what is a balanced equation with a relevant example. Give a reason why an equation is balanced with reference to the law of conservation of matter.
Write a balanced molecular equation for the following word equation:
\[\ce{Calcium + oxygen->Calcium oxide}\]
Underline the incorrectly balanced compound equation and rewrite the correct equation.
\[\ce{Fe2O3 + 2H2->2Fe + 3H2O}\]
Balance the following important equation:
NaAlO2 + H2O → NaOH + Al(OH)3
Balance the following important equation:
\[\ce{Pb3O4 + HCl -> PbCl2 + H2O + Cl2}\]
Balance the following important equation:
KMnO4 + HCl → KCl + MnCl2 + H2O + Cl2
Balance the following important equation:
S + HNO3 (conc.) → H2SO4 + H2O + NO2
It is necessary to balance a chemical equation in order to satisfy the law of:
Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is
Which of the following is(are) an endothermic process(es)?
- Dilution of sulphuric acid
- Sublimation of dry ice
- Condensation of water vapours
- Evaporation of water
In the double displacement reaction between aqueous potassium iodide .and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?
Which one of the following processes involve chemical reactions?
Write the balanced chemical equations for the following reactions and identify the type of reaction in each case.
- Nitrogen gas is treated with hydrogen gas in the presence of a catalyst at 773 K to form ammonia gas.
- Potassium hydroxide solution is treated with acetic acid to form potassium acetate and water.
- Ethanol is warmed with ethanoic acid to form ethyl acetate in the presence of concentrated H2SO4.
- Ethene is burnt in the presence of oxygen to form carbon dioxide, water and release heat and light.
Which among the following change is exothermic or endothermic in nature?
Dissolution of sodium hydroxide in water
