Carbon and its Allotropes (Diamond)

Which type of Allotropic Modifications of Carbon does Diamond lie in ?

• Amorphous Carbon

• Crystalline Carbon

• Sulphur

• Phosphorus

What type of structure does a Diamond have ?

How many free electrons does a diamond have

• 1

• 3

• None

• 4

A Diamond is neither a _________ of electricity nor heat.

• Insulator

• Semiconductor

• Semipermeable

• Conductor

Select the incorrect option(s) which are the uses of Diamonds.

• Used in nuclear reactors as moderators

• Manufacture of refractory crucible

• Manufacture of thin tungsten wires

• None of the above

What residue is formed when Diamond is heated above 700C-800C with the presence of oxygen ?

• Graphite

• No residue

• Carbon Dioxide

• Carbonado

Why does a Diamond sparkles ?

• The light that exits the crystals undergoes repeated reflections within the crystal before it emerges. Therefore light is reflected which lends a sparkle to the Diamond.

• The light that exists the Diamond undergrows repeated reflections within the crystal before it emerges. Therefore light is traped and lends a sparkle to the Dimond.

• The light that enters the crystals undergoes repeated reflections within the crystal before it emerges. Therefore light is trapped and lends a sparkle to the Diamond.

• The light that enters the Diamond undergoes vigorous reflections within the crystal before it appears. Therefore light is escaped and lends a sparkle to the Diamond.

What is the physical state of a Diamond

• Solid

• Transparent opaque solid with extraordinary brilliance.

• Transparent solid which sparkles and is the hardest substance on earth.

• Transparent with extraordinary brilliance.

Which element(s) exhibits allotropy ?

• Carbon

• Amorphous Carbon

• Sulphur

• Red Phosphorus

Why are diamonds used in jewelry/ornaments ?