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Question

Which of the following forms a molecular solid when solidified?

A
Calcium fluoride
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B
Silicon dioxide
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C
Carbon dioxide
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D
Sodium chloride
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Solution

The correct option is D Carbon dioxide
In the given options, Calcium Fluoride and Sodium Chloride are the ionic crystals due to presence of ionic bond in them.
Silicon dioxide is network solid due to strong intermolecular covalent bond.
In carbon dioxide, the molecules are bonded by weak van der Walls force. Hence, they are molecular solids.
So, the correct answer is option C.

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