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During which process does a gas change directly into a solid without becoming a liquid first?

hard Q10 of 15
General Science - Physics (Basics)
During which process does a gas change directly into a solid without becoming a liquid first?
ACondensation
BSublimation
CFreezing
DDeposition
Step-by-Step Solution
  1. Step 1: Understand phase changes

    Deposition is the direct change of gas to solid without passing through liquid state.
  2. Step 2: Differentiate from other processes

    Condensation is gas to liquid; sublimation is solid to gas; freezing is liquid to solid.
  3. Step 3: Confirm correct terminology

    Deposition is the correct term for gas to solid transition.
  4. Final Answer:

    Deposition → Option D
  5. Quick Check:

    Gas to solid direct change = Deposition ✅
Quick Trick: Deposition is reverse of sublimation.
Common Mistakes:
MISTAKES
  • Confusing deposition with condensation or freezing.
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