Question

A. Define the following:
1. Metallic lustre
2. Malleable metals
3. Good Conductors of heat
4. Noble metals
5. Corrosion ​

Answer 1

$\bf\huge{\underline{\pink{Metallic\:lustre}}}$

Luster refers to how light is reflected from the surface of a mineral. The two main types of luster are metallic and nonmetallic. What is Metallic Luster? Minerals exhibiting metallic luster look like metal, such as a silvery appearance or that of a flat piece of steel.

$\bf\huge{\underline{\green{Malleable\:metals}}}$

Metals are malleable, meaning that they can be formed into other shapes, such as thin sheets or foils, without breaking or cracking. They are also ductile, which means they can be easily drawn into wires.

$\bf\huge{\underline{\blue{Good\:Conductors\:of\:heat }}}$

Gold, Silver, Copper, Aluminium, Iron etc are good heat conductors as well as electrical conductors. The valence electrons in those metals are eager to transfer the energy received in any form.

$\bf\huge{\underline{\red{Noble\:metals}}}$

A noble metal is any of several metallic chemical elements that have outstanding resistance to oxidation, even at high temperatures.

$\bf\huge{\underline{\orange{Corrosion}}}$

When the surface of a metal is attacked by air, water some other substances, it is said to be corroded. This phenomenon is known as corrosion.

Answer 2

Answer:

Metallic Luster : -

It refers to how light is reflected from the surface of a mineral. The two main types of luster are metallic and nonmetallic. Minerals exhibiting metallic luster look like metal, such as a silvery appearance or that of a flat piece of steel.

Malleable metals :-

They can be formed into other shapes, such as thin sheets or foils, without breaking or cracking. They are also ductile, which means they can be easily drawn into wires.

Good Conductor of heat:-

Gold, Silver, Copper, Aluminium, Iron etc are good heat conductors as well as electrical conductors. The valence electrons in those metals are eager to transfer the energy received in any form.

Nobel metals :-

A noble metal is any of several metallic chemical elements that have outstanding resistance to oxidation, even at high temperatures.

Corrosion :-

When the surface of a metal is attacked by air, water some other substances, it is said to be corroded. This phenomenon is known as corrosion.

Explanation:

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