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Non - Metals

Name a non-me...

Question

Name a non-metal :
(a) which is lustrous
(b) which is required for combustion
(c) whose one of the allotrophic forms is a good conductor of electricity. Name the allotrope.
(d) other than carbon which shows allotropy
(e) which is known to form the largest number of compounds

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Solution

(a) Iodine is a lustrous non-metal because it is shiny.
(b) Oxygen is a non-metal that is required for combustion.
(c) Carbon, Graphite
(d) Sulphur
(e) Carbon

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Q. Question 30
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous; non-sonorous; non-malleable and are coloured.
(a) Name a lustrous non-metal.
(b) Name a non-metal which exists as a liquid at room temperature.
(c) The allotropic form of a non-metal is a good conductor of electricity. Name the allotrope.
(d) Name a non-metal which is known to form the largest number of compounds.
(e) Name a non-metal other than carbon which shows allotropy.
(f) Name a non-metal which is required for combustion.

Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.

The allotropic form of a non-metal, which is a good conductor of electricity is:

Q. Name:
(a) The metal which is liquid at room temperature.
(b) The allotrope of the non-metal carbon which conducts electricity.

Q. Name the following:

(a) A lustrous liquid metal.
(b) A liquid non-metal
(c) A metal which can be cut with a knife
(d) A non-metal which is good conductor of electricity.

Q. A solid element X has four electrons in the outermost shell of its atom. An allotrope Y of this element is used as a dry lubricant in machinery and also in making pencil leads.
(a) What is element X?
(b) Name the allotrope Y.
(c) State whether allotrope Y is a good conductor or non-conductor of electricity.
(d) Name one use of allotrope Y (other than lubrication and pencil leads)
(e) Name two other allotropes of element X.

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