Question

4. Differentiate between the following:a. Metal oxide and non-metal oxideb. Malleability and ductility​

Answer 1

a)Binary oxygen compounds containing electropositive metals are metallic oxides, while, those having nonmetals are non-metallic oxides.

Metallic oxides:

A chemical compound formed by metal and oxygen.

Examples:

Magnesium reacts with oxygen to form magnesium oxide

2Mg + 2O₂→ 2MgO

Other examples of metallic oxides – Na₂O, Al₂O₃, FeO, CuO, V₂O₅

Nonmetallic oxides:

In the air, nonmetal reacts with oxygen to produce nonmetallic oxides.  

Examples:

Carbon burns in air to produce carbon dioxide.

2C + O₂→ CO₂

Sulphur burns in air to produce sulphur dioxide.

2S + O₂→ SO₂

Other examples of non-metallic oxides – CO, NO₂, Cl₂O, XeO₄

b)

• Ductility is the property of being drawn into wire. It is a permanent strain that accompanied fracture in a tension test. It is a desirable property in machine components that are subjected to unanticipated overloads or impact loads. The ductility of the metals decreases as the temperature increases because metals become weak at increasing temperature. All ductile materials are also malleable, however, the converse is not always true.

• Malleability is defined as the ability of the material to deform to a greater extent before signs of cracks appear when it is subjected to a compressive force. The term malleability comes from the word hammer and in a narrow sense, means forged or extruded because these processes involve shaping under compressive force. In general malleability increases with an increase in temperature. Therefore, processes like forging or rolling are hot working processes where hot ingots or slabs are given shapes.

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Answer 2

Metal oxides are compounds composed of metal ions and oxide ions non-metal oxides are compound is composed of non-metal atoms and oxygen atoms the main difference between metal oxide is a non-metal oxides is that the metal oxides are basic compound where as non-metal oxides are acidic compounds

A malleable material is one in which a thin sheet can be easily formed by hammering gold is the most mailable material metal in contract ductility is the ability of a solid material will be formed under tensile stress