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Model Paper 8 — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceModel Paper 81 Mark
MCQ
Assertion (A): The conversion of gas directly into solid is called condensation.
Reason (R): Naphthalene leaves residue when kept open for some time.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A
  • C
    A is true but R is false.
  • ✓
    A is false but R is true.
✓

Answer

Correct option: D.
A is false but R is true.
(d) A is false but R is true.
Explanation: The conversion of gas directly into a solid is called desublimation. Naphthalene does not leave any residue when
kept open for some time.

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