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Question

A student is comparing samples of sulphur, carbon (Diamond), and bromine. Which property is least likely to be observed in all three?

This question was previously asked in
RRB Group D 2025 Question Paper (9-Aug-2026) (Shift 1)
The correct answer is

High electrical conductivity

Sulphur, diamond (a form of carbon) and bromine are all non-metals, and a defining property of non-metals is that they are poor conductors of electricity because they lack free, mobile electrons.

All three do share a dull (non-lustrous) appearance in their common form, are brittle when solid, and act as poor conductors of heat, which are typical non-metallic behaviours.

Hence, high electrical conductivity is the property least likely to be observed in all three.

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