Which of the following is more reactive?

H g

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A l

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A g

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C a

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Solution

The correct option is C $C a$
The most reactive metals in the activity series are the elements in Group 1 and group 2 metals. The reactivity increases as go down the group. Reactivity series is an empirical, calculated, and structurally analytical progression of a series of metals, arranged by their "reactivity" from highest to lowest. According to that $C a$ is more reactive than other given metals.

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