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.
Lakhmir Singh Chemistry Class 10
Answers
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a. Carbon
b. Graphite
c. Good conductor of electricity
d. Being resistant to chemicals and having a high melting point and also because it is a good conductor of heat, graphite is used to make crucibles.
e. Diamond n buckminsterfullerene
b. Graphite
c. Good conductor of electricity
d. Being resistant to chemicals and having a high melting point and also because it is a good conductor of heat, graphite is used to make crucibles.
e. Diamond n buckminsterfullerene
Answered by
2
Answer:
a. Carbon
b. Graphite
c. Good conductor of electricity
d. Being resistant to chemicals and having a high melting point and also because it is a good conductor of heat, graphite is used to make crucibles.
e. Diamond n buckminsterfullerene
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