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KCET2008ChemistryThermodynamics (C)

The correct order in which the first ionisation potential increases is

Options

  1. ANa , K , Be
  2. BK , Na , Be
  3. CK , Be , Na
  4. DBe , Na , K

Correct answer

B. K , Na , Be

Step-by-step solution

The first ionisation potential generally increases in a period from left to right and decreases in a group from up to down. Thus, the correct order of first ionisation potential is K < Na < Be

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