Q. 9

Which of the following is a network solid?
A. SO2 (Solid)

B. I2

C. Diamond

D. H2O (Ice)

Answer :

Diamond is a crystalline solid of non-metal Carbon and it has covalent bonding throughout the crystal. Between two adjacent atoms of the crystal there is a strong and directional interaction which results in a covalent bond which helps the atoms to held strongly at their positions. Therefore resulting in a very high melting point which indicates that diamond is a network solid.



The network structure of diamond


The other 3 options (i) SO2 (Solid) (ii) I2 and (iv) H2O (Ice) are examples of molecular crystalline solids


in which SO2 (Solid) is a type of polar molecular solid (strong dipole-dipole interaction b/w S and O results in stronger polar covalent bonds).


I2 can be classified as non-polar molecular solid (formed by weakest dispersion force, London force due to temporary induced dipole-dipole interaction.


And at last H2O (Ice) is hydrogen-bonded molecular solid (polar covalent strong interaction b/w H and O reinforces the formation of hydrogen bond.

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