Question

2. Assertion (A): Naphthalene balls disappear with time without leaving any
residue.
Reason (R) Naphthalene balls converts from solid to liquid state very quickly.​

Answer 1

Answer:

assertion is true and reason is false  

Explanation:

reasons for it is naphthalene balls convert from solid to gas (sublimation) slowly and gradually

Answer 2

Answer:

(A) is correct but (R) is incorrect .

Explanation:

• Yes , it's true that Naphthalene balls dissappear with time without leaving any residue .
• If the naphthalene balls change from solid to liquid , then we can see the residue . But in the Assertion , it is written that it disappear without leaving any residue .
• Naphthalene balls change from solid direct to gas .
• Substance which convert from solid to gas are called Sublimate and the process is called Sublimation .

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Tanishka Tanvi