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Blue copper sulphate crystals turn white on heating. The molecules driven off are:
ACarbon
BSulphur
CWater
DOxygen
Answer & Solution
Correct answer: C. Water
1. Some salts hold fixed water molecules inside them.
2. Heating drives that water out.
3. So the molecules lost are water.
_Source: syllabus Science Class X, Chapter 2, Acids, Bases and Salts._
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