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Q.

Which of the following metals exist in their native state in nature?
i) Ca
(ii) Au
(iii) Zn
(iv) Ag

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a

(i) and (ii)

b

(iii) and (iv)

c

(ii) and (iv)

d

(ii) and (iii)

answer is C.

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Detailed Solution

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  • Unreactive metals such as gold and silver are in the free state. 
  • Metals at the lower reactivity range fail to react chemically under normal conditions and are considered inert. 
  • This is because the valence electrons of particular metals are not easily available for chemical reactions.
  • Due to their inertness to chemical reactions, metals like gold, silver and platinum are placed at the bottom of the reactivity series. Consequently, they are generally found in their native state. 
  • Reactive metal compounds are generally present in combined form. 
  • Hence, option C is correct.
     
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