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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 hexagons of carbon atoms are present in one molecule of buckminsterfullerene?
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उत्तर
In one molecule of buckminsterfullerene, 20 hexagons of carbon atoms are present.
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संबंधित प्रश्न
Write structural formula of Methane.
What are covalent compounds?
What type of bonds are present in methane (CH4) and sodium chloride (NaCl)?
Draw the electron-dot structure of HCl compound and state the type of bonding.
Describe the structure of diamond. Draw a simple diagram to show the arrangement of carbon atoms in diamond.
The atomic numbers of four elements P, Q, R and S are 6, 10, 12 and 17 respectively. Which two elements can combine to form a covalent compound?
(a) P and R
(b) Q and S
(c) P and S
(d) R and S
What are the conditions necessary for the formation of covalent molecules?
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)
Explain the following term with example.
Covalent bond
Write answer as directed.
What causes the existance of very large number of carbon compound ?
Choose and write the correct option.
Which type of carbon-carbon bonds are present in Vanaspati ghee?
Give examples for the following:
Two liquid non polar compounds.
The following table shows the electronic configuration of the elements W, X, Y, Z:
|
Element |
W |
X |
Y |
Z |
|
Electronic |
2,8,1 |
2,8,7 |
2,5 |
1 |
Answer the following questions based on the table above:
What type of bond is formed between Y and Z.
Element A has 2 electrons in its M shell. Element B has atomic number 7.
If the compound formed between A and B is melted and an electric current is passed through the molten compound, the element A will be obtained at the ______ and B at the ______ of the electrolytic cell.
Name a greenish-yellow gas which also bleaches.
Generally, the melting and boiling point of carbon compounds are found to be less than _______ °C.
Which of the following statements are correct for carbon compounds?
- Most carbon compounds are good conductors of electricity.
- Most carbon compounds are poor conductors of electricity.
- Force of attraction between molecules of carbon compounds is not very strong.
- Force of attraction between molecules of carbon compounds is very strong.
The table shows the electronic structures of four elements.
| Element | Electronic Structure |
| P | 2, 6 |
| Q | 2, 8, 1 |
| R | 2, 8, 7 |
| S | 2, 8, 8 |
- Identify which element(s) will form covalent bonds with carbon.
- “Carbon reacts with an element in the above table to form several compounds.” Give suitable reason.
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.
