Chemistry S & P Block Elements DUHS 2024
PMDC Verified Question 18 of 104
Mostly p block elements react with ____ to form binary compounds: (Wrong)
A
Oxygen
B
Halogen
C
Water
D
Nitrogen
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Oxygen
Concept:

Binary compounds are chemical compounds consisting of exactly two different elements. P-block elements generally react vigorously with highly electronegative non-metals to form these compounds.

Solution:

  • Note on Source Ambiguity: The original exam paper tags this question as "(Wrong)" because both Oxygen and Halogens extensively form binary compounds with p-block elements.
  • According to the provided official answer key, Oxygen (Option A) is selected. Oxygen is incredibly reactive and forms binary oxides (e.g., \( \text{CO}_2, \text{NO}_2, \text{SO}_2, \text{P}_4\text{O}_{10} \)) with virtually all p-block elements.
  • (The author's explanatory notes argue for Halogens, as they also form binary halides like \( \text{PCl}_3 \) or \( \text{SF}_6 \), but we strictly follow the answer key's primary mapping).


Why other options are incorrect:

  • Water & Nitrogen: Nitrogen is relatively inert due to its strong triple bond, and water does not act as a primary agent to form simple binary compounds directly with most elemental p-block materials in the same universal manner as Oxygen.

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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