Question

Name two metals which are found in nature in the free state

Answer 1

Answer :-

• Gold (Au) and Silver (Ag) are the two metals that are found in nature in free state .

Step-By-Step-Explanation :-

• The above two elements are metals that are found in nature in free state because , they are Non-Reactive metals .
• The arrangement of metals in a series in descending order of their reactivity is known as the metal reactivity series .

All metal reactivity series are given :-

1. $\rm K\;\;,Ca\;\;, Na \rightarrow \bf\; Metals \; React \;With \;Water$
2. $\rm Mg,\;Al\;,Zn\;,Fe\;,Ni\;,Sn\;,Pb\;,H_2 \rightarrow \bf Metals\;React\;With\;Acid$
3. $\rm Cu\;,Hg\;,Ag\;,Au\;\rightarrow \bf Metals\;That\;Are\;Highly\;Unreactive$

The special Features of the metal reactivity series are :-

• As we move down from potassium to gold , the reactivity of metals decreases , This indicates the most active metal and gold is the least  active metals .
• Metals present at the top of the metal reactivity series can displace metals present lower down in the metal reactivity series .
• Hydrogen is not a metal , but it is listed in reactivity series for comparison.
• Generally , metals that are above hydrogen in the series can displace hydrogen ions from water , acids or alkalis . Those below hydrogen cannot do so .
• $\sf Zn + CuSO_4\rightarrow ZnSO_4+Cu$
• $\sf Fe+CuSO_4\rightarrow FeSO_4 +Cu$
• $\sf Mg +CuSO_4\rightarrow MgSO_4+Cu$
• Metals such as Zinc , iron and nickel that are above hydrogen can displace hydrogen from dilute acids . For example ,
• $\sf Zn + H_2SO_4\rightarrow ZnSO_4+H_2\uparrow$
• The upside arrow represents Gas which is Evaporating and going up and downside arrow represents Precipitate which is Precipitating at down  
• The combustion of hydrogen produces huge amount of energy . Therefore , hydrogen is used as the fuel in space rockets . Liquid hydrogen and Liquid oxygen (LOX) are stored for this purpose in special tanks in the space rockets .

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