Q.

Which of the following is not found in the native state?

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a

Au

b

Na

c

Cu

d

Pt

answer is D.

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Detailed Solution

Metal available in the free state is in the native state. They are less reactive metals like platinum, copper, gold, etc. But sodium is a highly reactive metal. They are available in the combined state during the free state.

Therefore, Option D is the correct answer.

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