Chemistry
Assertion (A): Naphthalene balls become smaller with the passage of time, as they sublime.
Reason (R): Naphthalene balls sublime, as such solids have stronger intermolecular forces of attraction in comparison to other solids.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Matter
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Answer
A is true but R is false.
Explanation — A is true as sublimable solids have weaker intermolecular forces of attraction in comparison to other solids. On heating, they acquire the kinetic energy of their vapour phase faster, and directly convert to the gaseous state without entering the liquid state.
R is false as substances that sublime (like naphthalene) have relatively weaker intermolecular forces, so particles can escape directly into the gas state.
Therefore, A is true but R is false is the correct option.
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