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A: Graphite is an aromatic hydrocarbon.
R: The enthalpy of formation of graphite is maximum amongst allotropes of carbon.

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Important Questions on The p-Block Elements

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Assertion: Among the carbon allotropes, diamond is an insulator, whereas, graphite is a good conductor of electricity.

Reason: Hybridization of carbon in diamond and graphite are sp3 and sp2 respectively.
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The number of six membered and five membered rings in Buckminster Fullerence respectively is
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In the long form of the periodic table, the valence shell electronic configuration of 5s25p4 corresponds to the element present in:
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In diamond, the hybridization of each carbon atom is
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Match list-I with List-II :

List - I List - II
A. Coke I. Carbon atoms are sp3 hybridised
B. Diamond II. Used as dry lubricants
C. Fullerene III. Used as a reducing agent
D. Graphite IV. Cage like molecules

Choose the correct answer from the options given below:

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Diamond is extremely hard whereas graphite is soft. This is because
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White phosphorous P4 has the following characteristics
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What is the hybridization of carbon atoms in fullerene?
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Identify the correct statements regarding fullerene.

i. It has 60 vertices.
ii. All the carbon atoms are in the sp3 hybridisation.
iii.The number of rings having six carbons each is 20 and the number of rings having five carbons each is 12.
iv.  All the C-C bond lengths in it are equal.

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The following statements concern elements in the periodic table. Which of the following is true?
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How many five-membered and six-membered rings are present in a buckmisterfullerene C60?
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Which among the following does not form polyhalide ion?
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The element that does NOT exhibits allotropy is-
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Explain the following property of group 16 elements:

Allotropy

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The INCORRECT statement regarding the structure of C60 is :
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The number of pentagons in C60 and trigons (triangles) in white phosphorus, are;