When a solid is heated, it turns directly into a gas. This process is

When a solid is heated, it turns directly into a gas. This process is called

Condensation

Evaporation

Sublimation

Diffusion

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This question was previously asked in

UPSC NDA-1 – 2016

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The correct option is C.

The process by which a solid changes directly into a gas upon heating, without passing through the liquid state, is called sublimation. This occurs for substances like dry ice (solid carbon dioxide) and naphthalene.

Condensation is the process of a gas turning into a liquid. Evaporation is the process of a liquid turning into a gas. Diffusion is the movement of particles from a region of higher concentration to a region of lower concentration, typically in gases or liquids.

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