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Q.

Select the correct statements:

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a

Based on reactivity series, occurrence of certain elements takes place in native state

b

Due to the basic nature of oxides of alkaline earth metals, they combine with atmospheric acidic oxides giving salts

c

Based on reactivity series, occurrence of certain elements takes place in atomic state

d

extraction from minerals is more economical than ores

answer is A.

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Detailed Solution

reactivity series explains the order of reaction of metals with respect to each other
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