Advertisements
Advertisements
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.
Advertisements
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")`
APPEARS IN
संबंधित प्रश्न
Write the balanced equation for the following chemical reaction.
\[\ce{Hydrogen + Chlorine -> Hydrogen chloride}\]
Why it is necessary to balance a chemical equation ?
Write balanced chemical equations for the following word equation:
Sodium + chlorine → Sodium chloride
Balance the following equation:
`Fe+ H_2O → Fe_3 O_4+H_2`
Balance the following equations Also name the products formed.
`K+CI_2→ KCI`
Balance the following equation. Also name the products formed.
`Zn+ HCI → ZnCI _2 + H_2`
Balance the following equation. Also name the products formed.
`N_2 + H_2 → NH_3`
Balance the following equation:
\[\ce{NO + O2->NO2}\]
Balance the following equation:
\[\ce{ZnS + O2->ZnO + SO2}\]
Underline the incorrectly balanced compound equation and rewrite the correct equation.
\[\ce{FeCl3 + 3NH4OH->2NH4Cl + Fe(OH)3}\]
Balance the following important equation:
FeSO4 + NaOH → Na2SO4 + Fe(OH)2
Balance the following important equation:
Cu + HNO3 (conc.) → Cu(NO3)2 + H2O + NO2
Balance the following important equation:
C + H2SO4 (conc.) → CO2 + H2O + SO2
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?
Which of the following is Not True with respect to the neutralisation reaction?
Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form a solution called lime water. Which among the following is (are) true about slaking of lime and the solution formed?
- It is an endothermic reaction
- It is an exothermic reaction
- The pH of the resulting solution will be more than seven
- The pH of the resulting solution will be less than seven
Which of the following gases can be used for storage of fresh sample of an oil for a long time?
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.
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 are the points to be followed while balancing a chemical equation?
