A change of state directly from solid to gas without changing into liquid state is called:

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Q: 22 (CAPF/2016)
A change of state directly from solid to gas without changing into liquid state is called:

question_subject: 

Science

question_exam: 

CAPF

stats: 

0,111,12,3,111,5,4

keywords: 

{'liquid state': [0, 0, 1, 1], 'emulsion': [0, 0, 1, 2], 'diffusion': [4, 1, 4, 12], 'gas': [9, 1, 9, 27], 'sublimation': [1, 0, 3, 6], 'fusion': [4, 0, 2, 2]}

The correct answer is option 2: Sublimation. Sublimation is a process in which a substance changes directly from a solid state to a gas state without going through the intermediate liquid state. This means that the substance bypasses the melting process and instead evaporates from its solid form to a gas form.

Option 1: Fusion is incorrect because fusion refers to the process of two or more substances combining to form a new substance.

Option 3: Diffusion is incorrect because diffusion refers to the process of particles spreading out and mixing with other particles.

Option 4: Emulsion is incorrect because emulsion refers to a mixture of two immiscible liquids, not a change of state.

Therefore, the correct term for a change of state directly from solid to gas without changing into a liquid state is sublimation.