Chemistry S & P Block Elements UHS 2022
PMDC Verified Question 47 of 104
Which group of the periodic table contain non-metals, metalloids and metals?
A
IB
B
IVA
C
VIIA
D
VIA
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: IVA
Concept:

The transition from non-metallic to metallic character occurs as you move down a group, particularly in the p-block.

Solution:

  • Group IVA (Group 14) is unique because it perfectly straddles the "staircase" line that divides metals and non-metals.
  • Carbon (C): At the top, is a classic non-metal.
  • Silicon (Si) & Germanium (Ge): In the middle, are metalloids (semiconductors) showing intermediate properties.
  • Tin (Sn) & Lead (Pb): At the bottom, exhibit low ionization energies and act as typical post-transition metals.
  • Thus, Group IVA is the only group listed that contains all three distinct classes of elements.


Why other options are incorrect:

  • Group IB: All are transition metals (Cu, Ag, Au).
  • Group VIIA: Halogens; almost entirely non-metals.
  • Group VIA: Chalcogens; mostly non-metals, ending in metalloids/weak metals, but IVA is the classic textbook example containing distinct members of all three.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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