Alloys are defined as homogeneous mixtures of two or more elements or metal and non metal. An alloy is formed by melting the metal and then it dissolves in the other elements. For example, steel is an example of alloy iron and carbon.
Alloys are defined as homogeneous mixtures of two or more elements or metal and non metal. An alloy is formed by melting the metal and then it dissolves in the other elements. For example, steel is an example of alloy iron and carbon.
Metals from its oxide obtained from reduction. Metal oxide is reduced by this process, metal oxides are reduced by using suitable reducing agents such as carbon or by highly reactive metals to displace the metals from their oxides. Example, On treating zinc oxide with carbon it reduces to metallic zRead more
Metals from its oxide obtained from reduction. Metal oxide is reduced by this process, metal oxides are reduced by using suitable reducing agents such as carbon or by highly reactive metals to displace the metals from their oxides.
Example, On treating zinc oxide with carbon it reduces to metallic zinc.
Manganese dioxide is reduced to manganese when treated with aluminium powder, so aluminium displaces manganese from its oxide.
Oxides of more reactive metals are reduced by electrolysis.
Gold, Silver are the metals that are found in free stable because these metals are least reactive, so they are present at the bottom of the reactivity series.
Gold, Silver are the metals that are found in free stable because these metals are least reactive, so they are present at the bottom of the reactivity series.
(i) Mineral: Minerals are the substances that are rich in particular metals and their composition is fixed. (ii) Ore: Minerals from which particular metals can be extracted profitably are known as ores. (iii) Gangue: The impurities like sand, silt, soil, gravel, etc. present in the ore are called gaRead more
(i) Mineral: Minerals are the substances that are rich in particular metals and their composition is fixed.
(ii) Ore: Minerals from which particular metals can be extracted profitably are known as ores.
(iii) Gangue: The impurities like sand, silt, soil, gravel, etc. present in the ore are called gangue.
Ionic compounds are formed by strong electrostatic forces of attraction between the ions. So, it requires a lot of energy to overcome these forces. So ionic compounds have high melting points.
Ionic compounds are formed by strong electrostatic forces of attraction between the ions. So, it requires a lot of energy to overcome these forces. So ionic compounds have high melting points.
Hydrochloric acid when added to a reactive metal like sodium, potassium etc. Hydrogen gas is evolved. When iron metal reacts with dilute H2SO4, iron sulphate is formed with the evolution of hydrogen gas.
Hydrochloric acid when added to a reactive metal like sodium, potassium etc.
Hydrogen gas is evolved.
When iron metal reacts with dilute H2SO4, iron sulphate is formed with the evolution of hydrogen gas.
Zinc is more reactive than iron. Therefore, when zinc is added to a solution of iron (II) sulphate, then it would displace iron from the solution. Zn + FeSO4 → ZnSO4 + Fe
Zinc is more reactive than iron. Therefore, when zinc is added to a solution of iron (II) sulphate, then it would displace iron from the solution.
(i) Iron reacts to steam to form ferrous oxide and hydrogen gas. 3Fe(s) + 4H₂O(g) → Fe3O4(s) + 4H₂(g) (ii) Calcium reacts with water and forms calcium hydroxide commonly known as slaked lime. Ca(s) + 2H₂O(l) → Ca(OH) ₂ (aq) + H₂ (g) 2K(s) + 2H₂O(l) → 2KOH(aq) + H₂(g) + heat energy
(i) Iron reacts to steam to form ferrous oxide and hydrogen gas.
3Fe(s) + 4H₂O(g) → Fe3O4(s) + 4H₂(g)
(ii) Calcium reacts with water and forms calcium hydroxide commonly known as slaked lime.
Sodium is highly reactive metal so it combines with air as well as water to form sodium oxide and hydrogen gas with heat energy.this heat is sufficient to burn hydrogen gas. That's why it catches fire if kept in open. Therefore, to prevent sodium from combining with air and accidental fires, sodiuRead more
Sodium is highly reactive metal so it combines with air as well as water to form sodium oxide and hydrogen gas with heat energy.this heat is sufficient to burn hydrogen gas. That’s why it catches fire if kept in open. Therefore, to prevent sodium from combining with air and accidental fires, sodium is stored in kerosene oil.
What are alloys?
Alloys are defined as homogeneous mixtures of two or more elements or metal and non metal. An alloy is formed by melting the metal and then it dissolves in the other elements. For example, steel is an example of alloy iron and carbon.
Alloys are defined as homogeneous mixtures of two or more elements or metal and non metal. An alloy is formed by melting the metal and then it dissolves in the other elements. For example, steel is an example of alloy iron and carbon.
Which metals do not corrode easily?
Metal present at the bottom of reactivity series like gold, platinum are least reactive hence they do not corrode.
Metal present at the bottom of reactivity series like gold, platinum are least reactive hence they do not corrode.
What chemical process is used for obtaining a metal from its oxide?
Metals from its oxide obtained from reduction. Metal oxide is reduced by this process, metal oxides are reduced by using suitable reducing agents such as carbon or by highly reactive metals to displace the metals from their oxides. Example, On treating zinc oxide with carbon it reduces to metallic zRead more
Metals from its oxide obtained from reduction. Metal oxide is reduced by this process, metal oxides are reduced by using suitable reducing agents such as carbon or by highly reactive metals to displace the metals from their oxides.
Example, On treating zinc oxide with carbon it reduces to metallic zinc.
Manganese dioxide is reduced to manganese when treated with aluminium powder, so aluminium displaces manganese from its oxide.
Oxides of more reactive metals are reduced by electrolysis.
Name two metals which are found in nature in the free state.
Gold, Silver are the metals that are found in free stable because these metals are least reactive, so they are present at the bottom of the reactivity series.
Gold, Silver are the metals that are found in free stable because these metals are least reactive, so they are present at the bottom of the reactivity series.
Define the following terms.
(i) Mineral: Minerals are the substances that are rich in particular metals and their composition is fixed. (ii) Ore: Minerals from which particular metals can be extracted profitably are known as ores. (iii) Gangue: The impurities like sand, silt, soil, gravel, etc. present in the ore are called gaRead more
(i) Mineral: Minerals are the substances that are rich in particular metals and their composition is fixed.
(ii) Ore: Minerals from which particular metals can be extracted profitably are known as ores.
(iii) Gangue: The impurities like sand, silt, soil, gravel, etc. present in the ore are called gangue.
Why do ionic compounds have high melting points?
Ionic compounds are formed by strong electrostatic forces of attraction between the ions. So, it requires a lot of energy to overcome these forces. So ionic compounds have high melting points.
Ionic compounds are formed by strong electrostatic forces of attraction between the ions. So, it requires a lot of energy to overcome these forces. So ionic compounds have high melting points.
See lessWhich gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute H2SO4.
Hydrochloric acid when added to a reactive metal like sodium, potassium etc. Hydrogen gas is evolved. When iron metal reacts with dilute H2SO4, iron sulphate is formed with the evolution of hydrogen gas.
Hydrochloric acid when added to a reactive metal like sodium, potassium etc.
Hydrogen gas is evolved.
When iron metal reacts with dilute H2SO4, iron sulphate is formed with the evolution of hydrogen gas.
See lessWhat would you observe when zinc is added to a solution of iron(II) sulphate? Write the chemical reaction that takes place.
Zinc is more reactive than iron. Therefore, when zinc is added to a solution of iron (II) sulphate, then it would displace iron from the solution. Zn + FeSO4 → ZnSO4 + Fe
Zinc is more reactive than iron. Therefore, when zinc is added to a solution of iron (II) sulphate, then it would displace iron from the solution.
Zn + FeSO4 → ZnSO4 + Fe
See lessWrite equations for the reactions of (i) iron with steam (ii) calcium and potassium with water.
(i) Iron reacts to steam to form ferrous oxide and hydrogen gas. 3Fe(s) + 4H₂O(g) → Fe3O4(s) + 4H₂(g) (ii) Calcium reacts with water and forms calcium hydroxide commonly known as slaked lime. Ca(s) + 2H₂O(l) → Ca(OH) ₂ (aq) + H₂ (g) 2K(s) + 2H₂O(l) → 2KOH(aq) + H₂(g) + heat energy
(i) Iron reacts to steam to form ferrous oxide and hydrogen gas.
3Fe(s) + 4H₂O(g) → Fe3O4(s) + 4H₂(g)
(ii) Calcium reacts with water and forms calcium hydroxide commonly known as slaked lime.
Ca(s) + 2H₂O(l) → Ca(OH) ₂ (aq) + H₂ (g)
2K(s) + 2H₂O(l) → 2KOH(aq) + H₂(g) + heat energy
See lessWhy is sodium kept immersed in kerosene oil?
Sodium is highly reactive metal so it combines with air as well as water to form sodium oxide and hydrogen gas with heat energy.this heat is sufficient to burn hydrogen gas. That's why it catches fire if kept in open. Therefore, to prevent sodium from combining with air and accidental fires, sodiuRead more
Sodium is highly reactive metal so it combines with air as well as water to form sodium oxide and hydrogen gas with heat energy.this heat is sufficient to burn hydrogen gas. That’s why it catches fire if kept in open. Therefore, to prevent sodium from combining with air and accidental fires, sodium is stored in kerosene oil.