Chemistry Chemical Bonding PMC 2021
PMDC Verified Question 63 of 102
Shape of \( \text{H}_2\text{S} \):
A
Angular
B
Tetrahedral
C
Octahedral
D
Trigonal planar
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Angular
Concept:

The shape of a molecule is determined by the positions of the atoms, heavily influenced by the invisible lone pairs on the central atom.

Formula:

$$ \text{Type} = \text{AB}_2\text{E}_2 $$

Solution:

  • Sulfur (Group VIA) has 6 valence electrons. It shares 2 with hydrogen atoms, leaving 4 electrons (2 lone pairs).


  • The 4 total electron domains arrange tetrahedrally.


  • The 2 lone pairs severely repel the 2 bond pairs, bending the molecule.


  • The resulting visible geometry is Angular (or Bent).


Why other options are incorrect:

  • Option B: This is the electron geometry, not the molecular shape.
  • Option D: Requires 3 bond pairs and 0 lone pairs.

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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