Which of the following statements is/are true?

Question

BlackTom AI · Accepted Answer

The question asks which statements are true, but the provided data is incomplete: the list of answer options is missing, leaving only one item in the answer field.

Given item in the answer field:
- "b. Sublimation means phase transition directly from solid to gas"

Analysis of the provided statement:
- Sublimation is defined as a phase transition that occurs when a substance changes directly from a solid to a gaseous state without passing through the liquid phase. This is a well-established concept in thermodynamics and phase diagrams.
- This process occurs under conditions where the vapor pressure of the solid becomes comparable to the surrounding pressure, such as dry ice (solid CO2) at room temperature and pressure, or solid iodine under appropriate conditions. Therefore, the statement correctly captures the essence of sublimation.
- A common point of confusion is the term "deposition" or "desublimation," which describes the reverse process: a gas turning directly into a solid, bypassing the liquid phase. The statement in option b does not describe deposition, but sublimation, so it is consistent with the standard definition.

Issues arising from missing options:
- Without the other answer choices, it is not possible to compare, contrast, or invalidate them. We cannot assess which statements are true beyond the provided item.
- If the original multiple-answers question included multiple true statements, the absence of the full options prevents a complete evaluation. Instructors typically provide all options so students can identify all true statements.

Summary of reasoning for the provided statement:
- The claim that sublimation is a direct solid-to-gas transition is accurate and aligns with the standard definition of sublimation in phase change terminology.

Note: Because the full set of options is not provided, this reasoning focuses solely on the single listed statement and does not evaluate any other potential options that may exist in the complete question.

Which of the following statements is/are true?Multiple choice

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