Chemistry S & P Block Elements DUHS 2023
PMDC Verified Question 40 of 104
Metallic property in a group of p-block element has a trend:
A
Decrease
B
Increase
C
Remains same
D
Irregular trend
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Increase
Concept:

Metallic character is strictly defined by an atom's ability to easily lose electrons (electropositivity).

Solution:

  • As we move down any group in the p-block (e.g., Group IVA: Carbon, Silicon, Germanium, Tin, Lead).
  • New principal electron shells are added, causing the atomic radius to enlarge significantly.
  • The increased distance from the nucleus and the heavy shielding from inner electrons cause the Ionization Energy to drop.
  • Because the atoms at the bottom of the group can lose their valence electrons much more easily than those at the top, their metallic property increases. (Notice how Carbon is a non-metal, but Lead at the bottom is a heavy metal).


Why other options are incorrect:

  • Metallic character decreases across a period, but always consistently increases down a group.

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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