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प्रश्न
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.
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उत्तर
- Metal zinc displaces hydrogen component on reacting with dilute sulphuric acid (H2SO4) as H2 gas which is evolved
`"Zn"("s") + "H"_2"SO"_2("aq") -> "ZnSO"_4("aq") + "H"_2("g")` - Ammonia and hydrogen chloride gas. When vapours of ammonia and hydrogen chloride gas are mixed, the compound formed is ammonium chloride. It is a white solid.
`"NH"_3("g") + "HCl"("g") -> "NH"_4"Cl"("s")` - Copper displaces silver from the aqueous solution of silver nitrate.
`"Cu"("s") + 2"AgNO"_3("aq") -> "Cu"("NO"_3)_2("aq") + 2"Ag"("s")`
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संबंधित प्रश्न
Balance the following equation:
`Fe+ H_2O → Fe_3 O_4+H_2`
Balance the following equation. Also name the products formed.
`NaNO_3→ NaNO_2 + O_2 ` Name of product (s)
Balance the following equation. Also name the products formed.
Ag +S → `Ag_2 S`
Balance the following equation. Also name the products formed.
`PbCO _3 → PbO +CO_2`
Balance the following equation:
\[\ce{Fe + H2O⇌Fe3O4 + H2}\]
Balance the following equation:
\[\ce{H2S + Cl2->S + HCl}\]
Underline the incorrectly balanced compound equation and rewrite the correct equation.
\[\ce{3NH3 + H2SO4->(NH4)2SO4}\]
Balance the following important equation:
ZnS + O2 → ZnO + SO2
Balance the following important equation:
MnO2 + HCl → MnCl2 + H2O + Cl2
Balance the following important equation:
NH3 + CuO → Cu + H2O + N2
Before burning in air, the magnesium ribbon is cleaned by rubbing with sand paper to:
A chemical reaction does not involve:
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
Which of the following gases can be used for storage of fresh sample of an oil for a long time?
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 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.
Balance the following equation.
\[\ce{Calcium chloride + Sulphuric acid -> Calcium sulphate + Hydrogen chloride}\]
Complete and balance the following equation:
\[\ce{CuSO4 + NH3OH ->}\]
Complete and balance the following equation:
\[\ce{NH4Cl + Ca(OH)2 ->}\]
