MCQ practice · SSC Chemistry Board questions · Chapter 2: States of Matter
Determining the melting point tells the purity of which substance?
Think it through first, then pick an option.
- a Sulfur
- b Glycerine
- c Chlorine
- d Camphor
Answer and explanation
Correct answer: a Sulfur
The book tests a sulfur sample’s purity by melting point: below 115°C means adulterated.
Why the other options are wrong
- b Glycerine: Glycerine is not a book example; melting point tests solids, and the book’s example is sulfur.
- c Chlorine: Chlorine is not the book’s example; the example is sulfur.
- d Camphor: Camphor is volatile: it does not melt but goes straight to vapour.
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