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Physical Properties

The solid ele...

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The solid element A exhibits the property of catenation. It is also present in the form of a gas B in the air which is utilised by plants in photosynthesis. An allotrope C of this element is used in glass cutters.
(a) What is element A?
(b) What is the gas B?
(c) Name the allotrope C.
(d) State another use of allotrope C (other than in glass cutters).
(e) Name another allotrope of element A which exists as spherical molecules.
(f) Name a yet another allotrope of element A which conduct electricity.

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Solution

(a) Carbon is the element A which exhibits the property of catenation.
(b) Carbon dioxide is the gas B which is utilised by the plants for photosynthesis.
(c) Diamond is the allotrope C of carbon which is used in glass cutters.
(d) Diamond is used in making jewellery.
(e) Buckminsterfullerene is an allotrope of carbon which exists as spherical molecules.
(f) Graphite is another allotrope of carbon which conducts electricity.

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Q. The solid element A exhibits the property of catenation. It is also present in the form of a gas B in the air which is utilised by plants in photosynthesis. An allotrope C of this element is used in glass cutters.
(a) What is element A?
(b) What is the gas B?
(c) Name the allotrope C.
(d) State another use of allotrope C (other than in glass cutters).
(e) Name another allotrope of element A which exists as spherical molecules.
(f) Name a yet another allotrope of element A which conduct electricity.

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A

is an element having four electrons in its outermost orbit. An allotrope

B

of this element is used as a dry lubricant in machinery and in pencil leads. So :
(a) Write the name of element

A

and its allotropes.
(b) State whether

B

is a good conductor or non-conductor of electricity?

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M_{x}

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M_{y}

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