Most reactive metal among the following is: (a) \( \mathrm{K} \) (b) \( \mathrm{Li} \) (c) \( \m...

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Most reactive metal among the following is:
(a) \( \mathrm{K} \)
(b) \( \mathrm{Li} \)
(c) \( \mathrm{Na} \)
(d) \( \mathrm{Cs} \)
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