JEE Main · 2022 · Shift-IImediumPERI-039

The metal that has very low melting point and its periodic position is closer to a metalloid is:

Classification of Elements & Periodicity · Class 11 · JEE Main Previous Year Question

Question

The metal that has very low melting point and its periodic position is closer to a metalloid is:

Options
  1. a

    Al

  2. b

    Ga

  3. c

    Se

  4. d

    In

Correct Answerb

Ga

Detailed Solution

🧠 Gallium melts at about 30 °C and sits right next to germanium (a metalloid) The question wants two boxes ticked at once: a very low melting point AND periodic-table position close to a metalloid. Only one element fits both.

🗺️ Check each option Al: melting point 660°C660\,°\text{C}. Far too high. Reject. Ga: melting point 29.8°C\approx 29.8\,°\text{C} — melts in your palm. And Ga sits right beside Ge, a recognized metalloid. Both conditions satisfied. Se: not a metal at all — it is a non-metal. Reject. In: melting point 156.6°C156.6\,°\text{C} — low for a metal but not "very low" like Ga. Also, In is not adjacent to a metalloid the way Ga is. Reject.

⚠️ The trap Don't confuse Ga with In. Both are Group 13 metals with relatively low melting points, but Ga's 30°C\sim 30\,°\text{C} is the famous one. The "melts in your hand" demo is always Gallium, never Indium. Ga is also the one that sits next to Ge on the staircase, so it ticks both criteria.

Answer: (b)\boxed{\text{Answer: (b)}}

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