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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 would be the electron-dot structure of carbon dioxide which has the formula CO2?
What type of chemical bond is formed between carbon and bromine?
Give one example of a molecule containing a triple covalent bond.
What type of chemical bonds are formed by carbon? Why?
Draw the electron-dot structure of CO2 compound and state the type of bonding.
Draw the electron-dot structure of HCl compound and state the type of bonding.
State one use of diamond which depends on its 'extraordinary brilliance' and one use of graphite which depends on its being 'black and quite soft'.
A hydrocarbon having one double bond has 100 carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be
(a) 200
(b) 198
(c) 202
(d) 196
Which of the following cannot exhibit isomerism?
(a) C4H10
(b) C5H12
(c) C3H8
(d) C6H14
An element E exists in three allotropic forms A, B and C. In allotrope A, the atoms of element E are joined to form spherical molecules. In allotrope B, each atom of element E is surrounded by three other E atoms to form a sheet like structure. In allotrope C, each atom of element E is surrounded by four other E atoms to form a rigid structure.
(a) Name the element E.
(b) What is allotrope A.
(c) What is allotrope B?
(d) What is allotrope C?
(e) Which allotrope is used in making jewellery?
(f) Which allotrope is used in making anode of a dry cell?
State the type of bonding in the following molecule.
Methane
Complete the following:
When the nuclei of two different reacting atoms are of ______ mass, then a bond so formed is called ______ covalent bond. (equal, unequal, polar, non-polar)
Complete the following:
In case of non-polar covalent bond, the covalent bond is formed in the ______ of atoms and shared electrons are ______ distributed. (corner, middle, equally, unequally)
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Ethene
Give examples for the following:
Two gaseous non polar compounds.
What is the difference between a polar covalent compound and a non-polar covalent compound?
Number of valence electrons in a carbon atom is _______.
The bond between two oxygen atoms is _______ bond.
Assertion (A): Melting point and boiling point of ethanol are lower than that of sodium chloride.
Reason (R): The forces of attraction between the molecules of ionic compounds are very strong.
