MCQ
Which one of the following substances consists of small discrete molecules
- A$NaCl$
- B$Graphite$
- C$Copper$
- ✓$Dry \,ice$
✓
Answer
Correct option: D.
$Dry \,ice$
d
A 'Discrete Molecule' is a covalent molecule in which the Intermolecular forces are really weak, hence the low melting and boiling points of these molecules. Therefore the answer is Dry Ice is a molecular crystal . The constituent particles are molecules. Intermolecular forces are weak van der waals forces. Such solids have low melting points.
A 'Discrete Molecule' is a covalent molecule in which the Intermolecular forces are really weak, hence the low melting and boiling points of these molecules. Therefore the answer is Dry Ice is a molecular crystal . The constituent particles are molecules. Intermolecular forces are weak van der waals forces. Such solids have low melting points.
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