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प्रश्न
Buckminsterfullerene is spherical molecule in which 60 carbon atoms are arranged in interlocking hexagonal and pentagonal rings of carbon atoms.
How many pentagons of carbon atoms are present in one molecule of buckminsterfullerene?
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उत्तर
In one molecule of buckminsterfullerene, 12 pentagons of carbon atoms are present.
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संबंधित प्रश्न
What type of bonds are present in water molecule? Draw the electron-dot structure of water (H2O).
What type of chemical bonds are formed by carbon? Why?
Explain the formation of a chlorine molecule on the basis of electronic theory of valency.
Explain why covalent compounds have generally high melting points?
Give the formula of the compound that would be formed by the combination of the following pair of elements:
Al and Cl2
One of the following compounds is not ionic in nature. This compound is:
(a) Lithium chloride
(b) Ammonium chloride
(c) Calcium chloride
(d) Carbon tetrachloride
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.
Which element exhibits the property of catenation to maximum extent and why?
Distinguish between ionic and covalent compounds under the following properties:
(i) Strength of forces between constituent elements
(ii) Solubility of compounds in water
(iii) Electrical conduction in substances
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Methanol
In the formation of electrovalent compounds, electrons are transferred from one element to another. How are electrons involved in the formation of a covalent compound?
Draw the electron dot diagram and structure of magnesium chloride.
State the type of bond formed when the combining atom has zero E.N. difference.
Name two compounds that are covalent when taken pure but produce ions when dissolved in water.
The molecular masses of a carbon compound spread over a range of _______.
Write scientific reason.
Benzene compounds are called aromatic compounds.
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
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Name the following:
\[\ce{CH3 - CH2CH = CH2}\]
Explain dipole (polar) molecule by taking hydrogen chloride as an example.
