NCERT Solutions of Metals and Non-metals Class 10
<< Chemical Properties of Metals (Part 2)Reactivity Series >>

Class ten Science CBSE

Metals and Non-metals

Metals:- Chemical Properties: Part-II

Reaction of metals with dilute acid:-

Metals form respective salts when react with dilute acid.

reaction of metals with dilute acid

Example:

(1) Reaction of sodium metal with dilute acid: Sodium metal gives sodium chloride and hydrogen gas when react with dilute hydrochloric acid.

reaction of sodium with dilute hydrochloric acid

(2) Reaction of potassium with dilute sulphuric acid:- Potassium sulphate and hydrogen gas are formed when potassium reacts with dilute sulphuric acid.

reaction of potassium with sulphuric acid

(3) Reaction of magnesium metal with dilute hydrochloric acid:- Magnesium chloride and hydrogen gas are formed when magnesium reacts with dilute hydrochloric acid.

reaction of magnesium with HCl

(4) Reaction of aluminium with dilute hydrochloric acid:- Aluminium chloride and hydrogen gas are formed.

reaction of aluminium with HCl

(5) Reaction of zinc with dilute sulphuric acid:- Zinc sulphate and hydrogen gas are formed when zinc reacts with dilute sulphuric acid. This method is used in laboratory to produce hydrogen gas.

reaction of zinc with sulphuric acid

CopperCopper, gold and silver are known as noble metals. These do not react with water or dilute acids.

Metal Oxides – Chemical Properties:-

Metal oxides are basic in nature. Aqueous solution of metal oxides turns red litmus blue.

Reaction of metal oxides with water:

Most of the metal oxides are insoluble in water. Alkali metal oxides are soluble in water. Alkali metal oxides give strong base when dissolved in water.

Example:

(1) Reaction of sodium oxide with water:- Sodium oxide gives sodium hydroxide when reacts with water.

reaction of sodium oxide with water

Sodium hydroxide is a strong base.

(2) Reaction of magnesium oxide with water:- Magnesium oxide gives magnesium hydroxide with water.

reaction of magnesium oxide and water

(3) Reaction of potassium oxide with water: Potassium oxide gives potassium hydroxide when reacts with water.

reaction of potassium oxide and water

(4) Reaction of zinc oxide and aluminium oxide:

Aluminium oxide and zinc oxide are insoluble in water. Aluminium oxide and zinc oxide are amphoteric in nature.

An amphoteric substance shows both acidic and basic character. It reacts with base like acid and reacts with acid like a base.

When zinc oxide reacts with sodium hydroxide, it behaves like an acid. In this reaction, sodium zicate and water are formed.

reaction of zinc oxide and sodium hydroxide

Zinc oxide behaves like a base when reacts with acid. Zinc oxide gives zinc chloride and water on reaction with hydrochloric acid.

reaction of zinc oxide and HCl

In similar way aluminium oxide behaves like a base when reacts with an acid and behaves like an acid when reacts with a base.

Aluminium oxide gives sodium aluminate along with water when reacts with sodium hydroxide.

reaction of aluminium oxide and sodium hydroxide

AluminAluminium oxide gives aluminium chloride along with water when reacts with hydrochloric acid.

reaction of aluminium oxide with HCl
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NCERT Solutions of Metals and Non-metals Class 10
<< Chemical Properties of Metals (Part 2)Reactivity Series >>

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