Which one of the following non-metals is present in solid state ?

[amp_mcq option1=”Bromine” option2=”Boron” option3=”Krypton” option4=”Radon” correct=”option2″]

This question was previously asked in

UPSC CISF-AC-EXE – 2017

The correct answer is Boron.

Non-metals exist in various states at room temperature: solid (e.g., Carbon, Phosphorus, Sulphur, Boron), liquid (Bromine), and gas (e.g., Hydrogen, Oxygen, Nitrogen, noble gases like Krypton, Radon). Among the given options, Bromine is a liquid, while Krypton and Radon are gases. Boron is a non-metal (or metalloid often grouped with non-metals) and exists as a solid under standard conditions.

Boron is a brittle, dark, lustrous metalloid. Elemental boron is used in semiconductors and pyrotechnics. Other common solid non-metals include carbon (diamond, graphite), phosphorus (white, red, black forms), sulfur, and selenium.

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