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NEET Chemistry QUESTION #7419
Question 1
The biggest jump (gap) in electronegativity values occurs between which pair?
  • B → Al✔️
  • A → Ga
  • Ga → In
  • In → Tl
Correct Answer Explanation
Electronegativity in Group 13:
Electronegativity values (Pauling scale):
  • B: 2.04
  • Al: 1.61
  • Ga: 1.81
  • In: 1.78
  • Tl: 2.04
The largest drop occurs from B (2.04) to Al (1.61) — a difference of 0.43, which is the biggest gap. This is because B is a metalloid while Al is a true metal.