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Human Eye And Colourful World

Question

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Differentiate the physical properties of diamond and graphite.

Solution

Physical properties of diamond and graphite

Property	Diamond	Graphite
(i) Appearance	Transparent	Shining black
(ii) Hardness	Very hard	Soft, slippery to touch
(iii) Electrical conductivity	Poor conductor	Very good conductor
(iv) Thermal conductivity	Very poor	Moderate
(v) Density, kg/m³	3,510	2, 250

Some More Questions From Human Eye and Colourful World Chapter

What are the physical properties of carbon compounds or covalent compounds?

Explain why covalent compounds are generally low melting?

Covalent compounds are bad conductors of electricity. Why?

Why are some elements in molecular form while others are in atomic form?

Give the different forms of carbon with examples.

Define Allotropy. Name the allotropes of carbon which occur in nature.

Differentiate the physical properties of diamond and graphite.

“Diamond and graphite are two allotropes of carbon”. What do you mean by this statement?

Give the structure of diamond. State its two important properties and two uses.

Give the preparation and structure of graphite. State its properties and uses.

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