Pick out the chemically most reactive elements from the given triads.
  • Li, Na, K
  • F, CI, Br
  1. Li and F
  2. Li and Br
  3. K and F
  4. K and Br

Correct Answer: (c) K and F

Explanation: As potassium (k) and fluorine (F) reacts with most of the other elements. Hence, they are most reactive in the given triads.


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