NCERT Question 3 (a) - Chapter 1 Class 9 - Matter In Our Surroundings

Last updated at August 10, 2026 by

Give reason for the following observations:

Naphthalene balls disappear with time without leaving any solid.

 

Answer

Naphthalene balls are volatile substances which sublime , i.e., they change from solid to gaseous state without coming into liquid state.

Hence, naphthalene balls disappear with time without leaving any solid.

q3 - Sublimation Gif.gif

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