Question

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☺ write short note on :-
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☺ (1.)= Reactivity series of metals

☺ (2.)= Purpose of making alloys

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Answer 1

1)Reactivity series in chemistry is experimental, structurally logical progression of series of metals in order of reactivity from highest to lowest.
Metals react differently with different substances. It gives a descriptive detail on metal reaction with extraction of metals from ores and with acids and water.

2) Pure metals possess few important physical and metallic properties, such as melting point, boiling point, density, specific gravity, high malleability, ductility, and heat and electrical conductivity. These properties can be modified and enhanced by alloying it with some other metal or nonmetal, according to the need.

Alloys are made to:

Enhance the hardness of a metal: An alloy is harder than its components. Pure metals are generally soft. The hardness of a metal can be enhanced by alloying it with another metal or nonmetal.

Lower the melting point: Pure metals have a high melting point. The melting point lowers when pure metals are alloyed with other metals or nonmetals. This makes the metals easily fusible. This property is utilized to make useful alloys called solders.

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Answer 2

Hii mate!!

1•In chemistry, a reactivity series is an empirical, calculated, and structurally made on the series of metals, arranged by their "reactivity" from highest to lowest order.


2•Pure metals have a few important physical and metallic properties, e.g ,melting point, boiling point, density, specific gravity, high malleability, ductility, and heat and electrical conductivity.
Alloys are harder than their components. Pure metals are mainly soft. The hardness of a metal can be enhanced by alloying it with another metal or non-metal.

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@garu1678