Question

5. The non-metal which has very high melting point is
a. Sulphur
C. Phosphorus
b. Graphite
d. Iodine
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Answer 1

Your ans is Graphite

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Answer 2

b. Graphite has the highest melting point.

Explanation:

• Graphite- 3600 degree celsius

• Phosphorus- 280.5 degree celsius

• Sulfur- 115.2 degree celsius

• Iodine- 113.7 degree celsius

• Graphite has the highest melting point. It undergoes sublimation rather than melting.

• In graphite, each carbon is linked to three other carbon atoms by covalent bonds. Layers of graphite are held by Van der waals force which is weaker than covalent bond.

• The layers contain delocalized electrons. These delocalised electrons are shared by all the atoms in any one layer of graphite and make the bonds between atoms stronger and the structure more stable in comparison to bonds in diamond.