Per NCERT, which substance is a CLASSIC example used to demonstrate sublimation in a school lab?
ASand
BAmmonium chloride (and other examples include camphor, naphthalene, iodine)
CCommon salt (NaCl)
DSugar
Answer & Solution
Correct answer: B. Ammonium chloride (and other examples include camphor, naphthalene, iodine)
Per NCERT Activity 5.7, ammonium chloride sublimes — passing directly from solid to gas. Salt, sugar, sand don't sublime under typical lab conditions.
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