Assertion (A) Aluminium is an amphoteric oxide.
"Reason (R): It reacts with acid and base to form salt and water.
(a) Both A and R are true and R is the correct explanation of underline A
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false
(d) A is false but R is true.
Answers
Answer:
Explanation: Amphoteric metal oxides react with both acids as well as bases to produce salt and water. Aluminium oxide is an amphoteric oxide because it reacts with acids as well as bases and form salts and wat
Answer:
Option A
Explanation:
Aluminium oxide is an amphoteric oxide because it reacts with acids as well as bases and gives salts and water. Aluminium has electronegativity 1.5. The electronegativity difference between aluminium (Al)(Al) and oxygen (O)(O) is small. Aluminium lies in group 13 in periodic table (electronegativity increases across a period). Aluminium oxide is insoluble in water and It is not reactive like sodium oxide and magnesium oxide.
Aluminium oxide is an amphoteric oxide because it reacts with acids as well as bases and gives salts and water. Aluminium has electronegativity 1.5. The electronegativity difference between aluminium (Al)(Al) and oxygen (O)(O) is small. Aluminium lies in group 13 in periodic table (electronegativity increases across a period). Aluminium oxide is insoluble in water and It is not reactive like sodium oxide and magnesium oxide.Reaction with acid- When Aluminium oxide reacts with Hydrochloric acid it gives Aluminium chloride and water . Aluminium oxide contains oxide ions so react with dilute hydrochloric acid.
Aluminium oxide is an amphoteric oxide because it reacts with acids as well as bases and gives salts and water. Aluminium has electronegativity 1.5. The electronegativity difference between aluminium (Al)(Al) and oxygen (O)(O) is small. Aluminium lies in group 13 in periodic table (electronegativity increases across a period). Aluminium oxide is insoluble in water and It is not reactive like sodium oxide and magnesium oxide.Reaction with acid- When Aluminium oxide reacts with Hydrochloric acid it gives Aluminium chloride and water . Aluminium oxide contains oxide ions so react with dilute hydrochloric acid.Al2O3+6HCl→2AlCl3+3H2OAl2O3+6HCl→2AlCl3+3H2O (this reaction shows Basic nature )
Aluminium oxide is an amphoteric oxide because it reacts with acids as well as bases and gives salts and water. Aluminium has electronegativity 1.5. The electronegativity difference between aluminium (Al)(Al) and oxygen (O)(O) is small. Aluminium lies in group 13 in periodic table (electronegativity increases across a period). Aluminium oxide is insoluble in water and It is not reactive like sodium oxide and magnesium oxide.Reaction with acid- When Aluminium oxide reacts with Hydrochloric acid it gives Aluminium chloride and water . Aluminium oxide contains oxide ions so react with dilute hydrochloric acid.Al2O3+6HCl→2AlCl3+3H2OAl2O3+6HCl→2AlCl3+3H2O (this reaction shows Basic nature )Reaction with base - When Aluminium oxide reacts with Sodium hydroxide it gives sodium aluminate and water.
Aluminium oxide is an amphoteric oxide because it reacts with acids as well as bases and gives salts and water. Aluminium has electronegativity 1.5. The electronegativity difference between aluminium (Al)(Al) and oxygen (O)(O) is small. Aluminium lies in group 13 in periodic table (electronegativity increases across a period). Aluminium oxide is insoluble in water and It is not reactive like sodium oxide and magnesium oxide.Reaction with acid- When Aluminium oxide reacts with Hydrochloric acid it gives Aluminium chloride and water . Aluminium oxide contains oxide ions so react with dilute hydrochloric acid.Al2O3+6HCl→2AlCl3+3H2OAl2O3+6HCl→2AlCl3+3H2O (this reaction shows Basic nature )Reaction with base - When Aluminium oxide reacts with Sodium hydroxide it gives sodium aluminate and water.Al2O3+2NaOH→2NaAlO2+H2OAl2O3+2NaOH→2NaAlO2+H2O (this reaction shows Acidic nature )
Aluminium oxide is an amphoteric oxide because it reacts with acids as well as bases and gives salts and water. Aluminium has electronegativity 1.5. The electronegativity difference between aluminium (Al)(Al) and oxygen (O)(O) is small. Aluminium lies in group 13 in periodic table (electronegativity increases across a period). Aluminium oxide is insoluble in water and It is not reactive like sodium oxide and magnesium oxide.Reaction with acid- When Aluminium oxide reacts with Hydrochloric acid it gives Aluminium chloride and water . Aluminium oxide contains oxide ions so react with dilute hydrochloric acid.Al2O3+6HCl→2AlCl3+3H2OAl2O3+6HCl→2AlCl3+3H2O (this reaction shows Basic nature )Reaction with base - When Aluminium oxide reacts with Sodium hydroxide it gives sodium aluminate and water.Al2O3+2NaOH→2NaAlO2+H2OAl2O3+2NaOH→2NaAlO2+H2O (this reaction shows Acidic nature )Note: When we write aluminium oxide reaction we get to know that it is reacting with acid as well as base so we conclude that it has amphoteric nature means it can react with both acid and base. Aluminium oxide is light, malleable, ductile, good conductor of electricity and heat. We come to know about the acidic and basic nature of any oxide only when we know that it is reacting with acid or base.