Chemistry Transition Elements UHS 2024
PMDC Verified Question 1 of 68
Which of the following is NOT an alloy
A
Steel
B
Bronze
C
Brass
D
Graphite
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Graphite
Concept:

An alloy is a physical mixture of a primary metal with other metallic or non-metallic elements to enhance its properties. Pure elemental forms or allotropes are not alloys.

Solution:

  • Steel: An alloy of Iron and Carbon.


  • Bronze: An alloy of Copper and Tin.


  • Brass: An alloy of Copper and Zinc.


  • Graphite: This is an allotrope (a specific crystalline form) of pure elemental Carbon. It contains no metals and is completely homogenous at the elemental level.


Why other options are incorrect:

  • Steel, bronze, and brass are all universally recognized metal alloys.

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.

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.